Sexual intercourses in magazines

20-05-2014, 13:11Print
A contraceptive method is that that prevents or reduces significantly the possibility of a fertilization in fertile women who maintain sexual intercourse of heterosexual character that include vaginal coitus. The methods that are administered after maintaining sexual intercourse are named contraceptive of emergency.

The history of the contraception indicates that it was in the second half of the XXth century when there was generalized the use and access to the different modern contraceptive methods. The generalization of the familiar planning and the sex education favor its use to long scale.

Election of the contraceptive method in adult magazines

No contraceptive method can consider better that other is not even completely sure, although some of them are considered to be more effective than different 1 Every method has its indications, for what the different users need to analyze which is more suitable for every circumstance and allows a better health sexual. The theoretical efficacy of every method increases greatly if it is used correctly.

Factors that must be considered in the election of the contraceptive method

Frequency of the sexual intercourse.
Number of sexual couples.
If it is desirable to have children (the irreversible methods must discard).
Efficacy of every method in the prevention of pregnancy
Side effects.
Facility and serviceability of use of the elected method.
Economic level to gain access to the above mentioned methods.
Efficacy and effectiveness of the contraceptive methods

Efficacy of the contraceptive methods

For the Society of Contraception there are methods that are considered to be effective and different little eficaces:

Effective contraceptive methods: birth-control pill, mini-tablet, postcoital tablet, vaginal ring, contraceptive patch, hormonal injection (monthly or quarterly), subcutaneous implant, intrauterine device (DIU) (of copper and of hormonal liberation), masculine condom and feminine condom, tie of horns, obstruction tubárica (method Essure) - and vasectomy
Slightly effective methods: method Ogino-Knaus, method Billings, basal temperature, sex method, discontinuous coitus and spermicide (in vaginal ova or you cremate).
The effectiveness of the different contraceptive methods measures itself for number of pregnancies for every hundred women to the year who use a certain method:

Effectiveness with suitable use of the contraceptive methods

Barrier methods


The masculine condom is one of the most used contraceptive methods.
Condom: it has a feminine version (feminine condom) and the masculine one (masculine condom)
Diaphragm: gum circumference with exterior hoop of gum that is located in the neck of the womb blocking the way to the sperms. A smaller variety of this one is the cervical hood.
LeaContraceptivum: the only size, it remains in its place due to a valve of sucking.
The barrier methods prevent the entry or ascent of the sperms to the womb and there are sanitary products therefore they must fulfill the sanitary requisites established to these products in every country or region.

Condom or condom

The masculine condoms are thin recoverings of rubber, vinyl or natural products that put themselves on the penis erecto. The masculine condoms can be treated by spermicide to offer major protection. These prevent the sperms from having access to the feminine reproductive device and prevent the microorganisms (sexually transmitted diseases - ETS - including the VIH) from going on from a member of the couple to other (only the condoms of latex and vinyl).


Feminine condom.
The feminine condoms are a thin recovering of plastic polyurethane with polyurethane hoops in opposite ends. These get in the vagina before the coitus. As the masculine condoms, the feminine ones prevent the sperms from having access to the feminine reproductive device and prevent the microorganisms (sexually transmitted diseases - ETS - including the VIH or been) from going on from a member of the couple to other.

Hormonal and chemical methods

The hormonal and chemical methods are contraceptive medicines that prevent the conception process from being able to take place. The performance way is different according to the method.

Feminine hormonal contraception

The hormonal contraception can be applied of diverse formas:

Vaginal ring: only one of monthly vaginal administration. It is a transparent, soft and flexible ring that is placed by the same user for vaginal route, liberating every day low hormones doses. It has no interferences with antibiotics, not at digestive level; its efficacy does not turn out to be altered by vomiting or diarrheas. Efficacy of 99,7 %.18
Birth-control pill, daily administration for oral route. Efficacy of 99 %. Can be a combined oral birth-control pill - the most used - or tablet of alone progestágeno.
Contraceptive patches.
Contraceptive subdermal: hormonal implant composed by a rod of the size of a match that is placed under the skin of the arm of the woman, offering contraceptive protection between 3 and 5 years. Nevertheless, the doctor can withdraw it in any moment and the woman will recover the fertility in a minimal time. Efficacy of 99 %.
Tablet without estrogen or tablet 0 estrogen, free tablet of estrogen, recommended for women who cannot or do not want to take them; the hormonal dose is so light that between other indications it is the only tablet prescribed during the lactation. Efficacy of 99 %.


Tablet: highly effective contraceptive method of low hormonal doses with a soft and staggered hormonal balance; it imitates the physiological cycle of the woman in progressive sequential form, offering strict control of the cycle. Also, it reduces the facial fat, by what it can be indicated for the treatment of light acne to moderated.
Injectable hormonal method: method of long duration that is injected into a muscle. It contains estrogen and luteosterone: it is necessary to apply in the suitable period, in the opposite case it is necessary to use barrier methods to avoid the pregnancy.
Also there exists the hormonal contraception that suppresses the rule.
Masculine hormonal contraception

At present the masculine hormonal contraception is in development. In China it has been proved by the Gosipol. Tests have been done in Australia, China and in Alemania. Generally it is a question of an injectable dose that is applied every 6 months. It possesses significant side effects: anomalies production in the hipopotasemia levels, effects in the digestive system, as well as also increases in the fatigue 25 levels Also it presents itself as a modulator of the levels of potassium, causing, consequently.

Masculine not hormonal medicines

In 2013, a scientific group of the UNAM, headed by Alberto, there has identified the channels of calcium potassium, that are exclusive of sperm, and necessary in the regulation of its mobility, trajectory towards the feminine ovum, as well as in its fertilization. One was employed at the search of specific molecules that suppress the action of both channels and this way to manage to develop a contraceptive reversible, not hormonal masculine one, which does not generate effects secundarios.

Chemical contraception

Spermicides: the spermicides are chemicals (in general, nonoxinol-9) that they deactivate or kill to the sperms. They are available in ova, aerosols you (foam), cremate, vaginal tablets, suppositories or dissoluble vaginal movies. The spermicides cause the rupture of the membranes of the sperms, which diminishes its movement (motilidad and mobility), as well as its aptitude to fertilize the ovum.

Intrauterine device to read in xxx magazines pdf.

The intrauterine device (DIU) is a sanitary product that, by means of the laying inside the womb of a plastic device with metallic elements (charge), an alteration of the microclimate produces to itself intrauterino that makes difficult to a great extent the fertilization, as well as the implantation of the fertilized ovum. Its duration is 3 to 5 years. The DIU has an efficacy of 99 percent.

Double protection

The double protection consists of the employment of two contraceptive methods during the sexual intercourse being, normally, the condom one of them. The combination of two methods offers a contraceptive safety major to use only one method which is beneficial when one or both are methods that depend on the user (like the ACO). Also the condom includes protection infections of sexual transmission that other contraceptive methods do not have. The combinations can be condom and DIU, condom and hormonal contraception, condom and spermicide.

Double protection: condom with contraceptive hormonal

The use on the part of the woman a contraceptive feminine hormonal one to avoid of very effective form the pregnancy together with the use of the condom or condom on the part of the man.

Double protection: condom with spermicide

Considered an excellent contraceptive method, due to an effectiveness of 99 % (similar to the birth-control pill). There consists of combining the use of masculine condom together with a cream spermicide (eg. Delfen). The cream is placed by a special applicator that comes with the packing and the man uses the condom of a habitual way. It has the aggregate advantage of lubricating the vaginal channel, facilitating this way the penetration.

Natural methods

The natural methods of knowledge of the fertility are based on the observation of symptoms associated with the physiological processes that give place to the ovulation, and in the adaptation of the sexual act to the fertile or unfertile phases of the menstrual cycle according to which a conception is wished or not, without the use of medicines, mechanical procedures not quirúrgicos. Any methods predictivos are still taught by certain preference in the gynecological schools, like the method of Ogino-Knaus or method of the cycle, while other skills, so ancestral as they have the «discontinuous coitus» nowadays a reliability similar to that of other methods.

Other natural methods are based on the conscience of the fertility, that is to say, the woman observes with attention and registers the fertility signs in its body to determine the fertile or unfertile phases. The specific symptoms fall down in three categories: changes in basal temperature, in the cervical snot and the cervical position. Registering both the basal temperature and another primary sign, knows as the method that "sintotermal".34 35 Other methodologies include the monitoring of the levels in urine of estrogen and LH along the menstrual cycle.

The World Organization of the Health classifies the modern methods of natural familiar planning like «good« or «very good». Some of them has less values of Pearl's index. The Society of Gynecology and Midwifery has published a document consensus on the natural PFN methods.

There are methods that, so that they could be used like sure methods of control of the fertility, need certain discipline grade in the autoobservación/anotación and correct learning with materials and quite prepared personnel. A criticism of these methods is that of that, unlike some barrier methods like the condom, they prepare neither against the nor VIH in general against any other sexually transmitted disease.

According to Barbara Barnett de Family Health International the women who suffer illnesses for which the pregnancy in xxx adult magazines pdf is unacceptable, must use permanent contraceptive methods or more.

Of the natural methods those that have demonstrated a less efficacy level are the method Ogino/Knauss and the coitus interruptus (discontinuous coitus) As for the modern methods, the most effective is the sintotérmico with double control significantly top in efficacy on the method of the ovulation.

Adolfo has summed up the advantages and disadvantages of these methods.

Simple methods

Basal temperature: it makes use of the increase of the progesterone, which it affects to the internal corporal temperature of the woman during the ovulation and determines, once diagnosed, unfertility posovulatoria. For it the woman must observe the internal corporal temperature along the menstrual cycle. The strict method of the basal temperature circumscribes the unfertility period exclusively to the days later to the increase of temperature. The extended method of the basal temperature defines, complete certain conditions, 6 days of unfertility preovulatoria. The method of the basal temperature is highly trustworthy in the period posovulatorio, and he supposes the base of most of the modern natural methods. Nevertheless it has limitations at the time of determining the unfertility preovulatoria.
Method of the ovulation (method Billings and others): it is based on the daily observation of the changes of the cervical snot along the feminine cycle, changes that collaborate to the increase in the levels of previous estrogen at the moment of the ovulation. Normally, the phases of unfertility of the woman are characterized by an absence of visible cervical snot and a sensation of vaginal dryness. The same way as about the moment of the ovulation the cervical snot is done throughout several days and of progressive form, more and more liquid, flexible and transparent. Next at the moment of the ovulation the snot and its possible disappearance produces to itself the called peak of snot characterized by an abrupt change of the properties. The cervical snot is a fertility sign and by it its observation can be used for the control of fertility 41 The reliability is superior to 95 % in several countries estudiados.42 Although, applied correctly, it can be considered to be a sure method, it is lower than the method of the temperature in phase posovulatoria. Its use is especially suitable for the attainment of the pregnancy in cases of hypofertility, since it allows to concentrate the sexual intercourse concerning the moment of major probabilities of pregnancy. As contraceptive method is especially insecure in women with cycles monofásicos (during the menarche or before the menopause).
Compound methods

Method: it combines the method of the basal temperature, for the diagnosis of the unfertility posovulatoria, in combination with another series of symptoms (cervical snot and neck of the womb, between others) and calculations of length of cycles for the determination of the unfertility preovulatoria. He allows to benefit from the practical infallibility of the basal temperature at the time of determining the unfertility posovulatoria and increasing greatly the efficacy in period preovulatorio. Its efficacy is equivalent to the modern preparations of oral anovulants and only lower than the surgical sterilization. An additional advantage is that it is a valid and the same way effective method in all the circumstances of the reproductive life of the woman (postnatal period, pospíldora period, premenopause, etc.).
Surgical methods


It charts on vasectomy.
Salpingoclasia, tie of horns or occlusion tubaria bilateral (OTB). It consists of tying the Falopio horns with staples in order to prevent the ovum from being implanted in the womb or the sperms from meeting him.
Vasectomy. It is a surgical operation to cut the deferential conduits that they transport to the sperms of the testicles on the outside when it is ejaculated. Once realized, the sperms that every day take place are re-absorbed by the organism. Since the seminal liquid is prepared in the prostate, the vasectomy does not prevent the ejaculation. It is a reversible process although with difficulties.
In a rapid comparison between both methods, it is possible to observe that the vasectomy can be done by local anesthesia and in an ambulatory way; on the other hand the horns tie, they always need general anesthesia, it is necessary to do them in operating theater with a short hospitable revenue although generally it is possible to give high in the same day According to the Classification system surgical Johns Hopkins, the vasectomy is a grade 1 and the tie of horns, grade 2; in a scale of 5.

Emergency methods

With the term contraception of emergency, poscoital contraception or contraception preimplantacional 46 are considered to be different methods:

Intrauterine device of copper inserted after the coitus and up to cinco or seven days after the sexual intercourse without protection. This method is effective in the prevention of the pregnancy in 99,9 %.

Morning-after pill - emergency tablet

Acetate of ulipristal, also known as tablet of five days later (it marks ellaOne), is considered by Horacio Croxatto ― expert in emergency contraception and creator of the subcutaneous implant, the contraceptive one of more effective not hormonal urgency for woman.
Levonorgestrel (composed only by luteosterone), known also like emergency birth-control pill (PAE) and commonly called "morning-after pill"). The emergency birth-control pill has an efficacy of 75 % to 89 %.
Mifepristona in small doses (of 25 mg to 50 mg) is considered as contraceptive of emergency ahead of levonorgestrel. Your use as contraceptive of emergency it is much extended in Russia and Chinese. In dose of 600 mg (together with Misoprostol 400 µg) is considered to be abortive and he must be administered by medical recipe; since abortive it provokes an early chemical abortion (in the first 49 days) and in some countries the stay is obligatory in a center it come up. The action tablet antiprogestacional RU-486 it is considered how abortive if it is used during the first ten days of amenorrea. It is necessary to point out that the abortion is not considered to be a contraceptive method, since the conception has already taken place.
Meloxicam can be confirmed like an effective emergency contraceptive one and, according to Horacio Croxatto, replace the contraceptive hormonal ones. Meloxican is usually an anti-inflammatory not esteroideo (inhibitor of the Ciclooxigenasa, COX2) used how analgesic, anti-inflammatory and antipyretic ―en arthritic processes ―, of easy access and limited price, has demonstrated (studies of 2009 and 2010) that inhibits the ovulation (there prevents the break of the follicle that contains the ovum by what it cannot be fertilized), taken in dose of 30 mg. for five days continued after the sexual intercourse behaves like an effective urgency contraceptive one. The meloxican does not alter the endocrine system and does not cause menstrual alterations. One the studies Jill L has been carried out by Cristián Jesam, Ann Maria Salvatierra. Schwartz and Horacio B. Croxatto, investigators of the ICMER Chilean Institute of Reproductive Medicine and of the faculty of Chemistry and Biology of the University of Santiago de Chile.54 55 56 57 58
Method of Yuzpe, combinations of estrogen and luteosterone, less and less used before the appearance of more effective alternatives and with less side effects, like the morning-after pill (levonorgestrel), the ulipristal acetate and her mifepristona. The Yuzpe method does not turn out to be effective when the implantation process has already begun.
Heat methods

Warning: the long use of these methods can cause unfertility perm

These experimental contraceptive methods for males consist of increasing the temperature of the testicles to prevent temporarily the espermatogénesis and this way to reduce the number of sperms seminal 61 in the flow Although there are no methods endorsed by the scientific community, different experiments throughout the XXth century corroborate its effectiveness; between these it is necessary to emphasize the studies realized during two decades in India for doctor Vögeli.62 Asimismo, its diffusion in Internet has increased the number of persons who have applied these methods for their own account of a home-made way with results variables.63

Method of the hot water: there consists of immersing the scrotum in hot water to a temperature determined during a certain number from minutes until the day, several consecutive days, which can produce several months of unfertility. Although it is uncomfortable and demands dedication, it is the most well-known and applied method. There do not know cases of unfertility caused by this method.
It consists of raising manually the testicles to the channel inguinal, so that its temperature climbs at the level corporal. In contrast to The method of the hot water, this one must be practised constantly for several hours a day along the whole period in which the unfertility is wished. A user of this method brought permanent unfertility after practising for more of one decade.
Ultrasound method: it consists of immersing the scrotum in a water glass, in whose interior finds an ultrasound element, which warms the glass and promotes the ions exchange in testículos. One believes that a treatment of 15 minutes can produce several months of infertilidad. Although it is considered to be the surest and effective method, it is not possible to do it at home, therefore it is necessary to wait for future developments of this technology.
Use of contraceptive methods in the world

The Report on world use of contraceptive, there gathers the evolution of use of the different contraceptive methods in practically all the countries of the world as well as estimations on the shortcomings in planning relative.

Ethical and religious considerations

Some contraceptive methods, the "morning-after pill" (levonorgestrel), the tablet of five days later (acetate of ulipristal) and the mifepristona, can act preventing the nesting of the blastocisto (one of the phases for which the fertilized ovum happens) still not implanted in the maternal endometrio. It is for it that there are persons who consider them to be «abortive contraceptive methods», and push them back distinguishing them of considered like «not abortive contraceptive methods» (that avoid the conception in a strict sense). Religious institutions as the catholic Church have proved to be opposite to not natural contraceptive methods, especially to those that they consider like abort.

A sexual intercourse is the set of behaviors that at least two persons realize with the target to give and/or to receive sexual pleasure. The sexual intercourse they can include many practices as the magreo, the oral sex or the coitus. The coitus consists of the introduction of the penis in the vagina. In case of fertile heterosexual couples, also reproductive ends can be present.

Sexual intercourse and matching

The term sexual intercourse is used to refer to the sexual behavior of the human beings. The term matching is used to refer to the rest of animals. In biology, the matching is the set of all the behaviors of courtship and it raises that two individuals of different sex realize to procreate, and that culminates with the coitus; in opposition to the possibility of generating descent with the only one (hermaphrodites' self-fertilization, parthenogenesis).

Types of sexual intercourse to download in pdf adult magazines

According to the person's quantity involved in the same moment and place
Two, as in a couple
Trio or ménage to trois.
Bacchanal or group sex: several individuals have sexual intercourse at the same time and in the same place.
According to the tie of the involved persons.
With affective ties more or less developed as in many types of couples (marriage, engagement, friendship with rights or polyaffectionate groups)
Only with the target to give and to receive sexual pleasure (occasional sex or couple exchange)
With money of for way (sexual work)
According to the genre of the participants
Between women, typical but not limited to the lesbians and bisexual women
Between males, typical but not limited to the gays and bisexual males
Compound, typical but not limited to the heterosexual and bisexual persons
Including persons transgénero or intersexual, typical but not limited to the pansexualidad
Other types
Shared use of sexual toys
BDSM in sex magazine
Inclusion of other parafilias
Not spoiled sexual practices
In our culture the requisite to consider a sexual practice to be a part of a valid sexual intercourse and not a crime is the assent. This way, the sexual practices can be spoiled or not.

Some of the sexual practices in which the assent of a person is missing have name individuals.

Violation that takes place when a person has sexual access towards other one, by means of the employment of physical or psychological violences or by means of the use of mechanisms that annul the assent of the offended ones. Also one speaks about violation when the victim cannot give its assent, as in the cases of incapable mental, less than age, or persons who are in the unconsciousness state, across alcohol or other drugs.
Infantile sexual abuse or pederasty: it is any conduct in which a minor is used like sexual object on the part of another person with whom it maintains an inequality relation, be already as for the age, the ripeness or the power.
Forced prostitution, one of the ends of treats of persons come up certainly his type of procuring
Other practices where the assent is missing are the necrophilia, sexual practice between a person and a corpse and the zoofilia, the sexual practice between a person and an animal.

Like the first approach, the practices can split in coitales and not coitales. Inside the not coitales we can mention

Magreo: hugs, caresses and kisses.
Sexual games
Mutual masturbation.
Oral sex directed to the genitals (fellatio, cunnilingus, 69), the year (anilingus) or other parts of the body (oral Stimulation of the nipples)
Genital - genital sex without penetration: Tribadismo and Frot
Coitus or coitus

The coitus or coitus (of the Latin: co-iter, ‘it goes together’ or ‘to go together’) is the insertion and pelvic propulsion of the penis in the vagina or the year. In the human beings the coitus is one of the sexual practices that is part of the sexual intercourse. Also it is the normative practice of the sexual intercourse (see coitus). The authors usually use the word coitus to refer to the vaginal one Of the sexual practices, it is the practice more risks it has of being a route of broadcast of infections of sexual transmission (ITS), for it it is the main target of the recommendations of the sure sex.

Vaginal coitus

The vaginal coitus consists of the introduction of the penis in the vagina. It is the sexual practice that, between fertile persons, has probabilities of resulting in the fertilization and pregnancy therefore it is the target of some contraceptive methods.

Although one tends to think that the original form of the vaginal coitus in human beings is called to tergo or ventro-back — since this one exists in other mammals of an almost exclusive way — there exist studies that doubt this theory and find relation between the coercions of morphologic type and the preference to the coitus ventro-ventral in the man and in the chimpanzee bonobo.7

The sexual position to tergo — this is, the penetration of the penis the vagina when the female is of backs the male — is usually called levrette, if the woman is resting on its legs and arms, although also it is realized when the woman is penetrated vaginalmente of backs (for example, put to bed supporting its back in the male).

The most common form of coitus in human beings is the ventro-ventral or hood, coloquialmente called position of the missionary, since popularly there assumes the introduction of this form of coitar in Oceania to the missionaries.

Another frequent position during the coitus in the human beings is the Andromeda position, with the woman seated on the stretched out man. This time exposure gives more possibility of movements both to the woman and to the male, since both can use its hands to caress other parts of the body.

Anal coitus

In the anal coitus the penetration is realized in the year. In academic language also the term is used sometimes "pedication".

The anal mucous membrane lacks lubrication and it is even easier to irritate that the vagina, for which, it has major risk of transmission of ITS, especially the VIH, if it is not realized in a sure way.

Coitus

The coitus is the tendency to the sexuality in significant, adult and finished practices (the coitus) and vagin, infantile and immature practices (other practices) to the point of going so far as to confuse sexual intercourse with coitos and not to name and sexual intercourse status the sexual practices in which coitus has not taken place or not to consider them to be a route of securing to please or orgasm.

The coitus, is located like one of the characteristics of the hegemonic and normative sexuality which also will have to be procreativa, genital, monogamous, in the marriage, naturalized, for love, at home, of to two, and, of course, heterosexual. The rest of practices will be pushed back and corrected of abnormal, unnatural, sinful or enfermas. Although it is accepted that the coitus also is present like norm in some relations homosexuales.

In Occident, the Judeo-Christian tradition has been linked in the support of the coitus. According to this tradition, the sexual act is valid only in the marriage, and a way turns to express intimate feelings, to acquire responsibilities and, especially, to reproduce to the species. According to this doctrine, not heterosexual sexuality, and out of the marriage, is immoral. For the libertarian ones, it is the absence of assent, or a power imbalance - like the forced coitus - that is immoral, but for many conservatives the marital coercion is not immoral context as one of the "ballasts".

It is located along with other orders of the hegemonic masculinity as there is the falocentrismo, that is to say, the reduction of the masculine body to the penis, the denial of any other sensitive area and of pleasing; and the denial of the emotiveness; all these attributes necessary for harmonic relations to the interior of it seem.

The appearance of the concept of coitus and its criticism comes from the hand of the feminism, and the last technological advances on the subject of contraception and abortion and reforms them sexually happened in the XXth century thanks to those that the payroll of sexual practices is extending socially aceptadas.

The coitus in the literature

In addition to the Marquess of Sade, many other authors (Chaucer, Bocaccio, Petronio or Rabelais) have described this type of practices in its works. An example about the vaginal sex is in the story "The devil and the hell", of book Decamerón, of Giovanni Boccaccio.

Sexual controversies

The sexual intercourse has always been a controversial topic along the history of all the civilizations , especially in the Judeo-Christian culture. The religions have influenced of an important form the concept of the sexuality. In general terms it is known that to realize the sexual act contributes to the relaxation. Inside the western culture, there are illegal certain acts like the pederasty (in the mass media they confuse it, but it is necessary to distinguish it from the paedophilia that is only the sexual attraction that an adult person feels towards children or adolescents), the incest, or the violation. The pederasty and the violation are crimes in almost all the countries of the world.

Sexual activities like the adultery, homosexuality, bacchanals and prematrimonial relations, can be pushed back or accepted by certain groups of persons, although they are practical not sanctioned largely of Occident and other places, while a punitive tendency exists in theocratic and fundamentalist societies.

In many Islamic countries all sexual activity out of the marriage is illegal.

In English language, multitude of terms is used coloquialmente to refer, in the human beings, to the sexual intercourse, to the sexual act, to the coitus; some of them: follar, to take, to have sex, to fuck, to live together, to get drunk, to happen for the weapon, to give inside, to throw a dust, to check measurements, to have meeting of bellybuttons, to feed him the guy, to rise to the guava tree, to dampen the slate pencil, to fornicate, to put necklace to the pescuezona, to give broth, to celebrate a H. Town hall, etc.


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Anatomy
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Heterosexuality
Homosexuality
Anexo:posturas sexual
Masturbation
Infantile sexual abuse
Pornography
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Occasional sex
Sure sex
Sexuality
Human sexuality
Sexual selection


The sexual selection is a key concept of the theory of the evolution minted by Charles Darwin in its e-book The origin of the species to explain the development of secondary sexual characters in the living beings who seemed not to answer to the natural selection, that is to say, to the survival of the best adaptado.1 In general lines, it postulates that certain present features are the result of the competition between individuals of the same sex for the access to the coitus (selection intrasexual) and of the selection on the part of one of the sexes, usually the females, of individuals of the opposite sex (intersexual selection).

It is related straight to this evolutionary mechanism to the sexual dimorphism and to the presence of exaggerated morphologic features. Many of these morphologic features go so far as to suppose a decrease in the adaptive capacities and of survival of the animals who possess them. To explain its development, inside the sexual selection, two so called hypotheses are postulated «of Fisher», conceived by Ronald respectively. The first one of them explains this exaggerated development of physiological structures in a sex for the direct identification of these with top genomes on the part of its sexual couples. The second one of the hypotheses indicates that the presence of exaggerated morphologic features they ballast the survival of the organisms that show them; its sexual couples would feel preference to they for being capable of surviving in spite of the handicap that these features suppose to them.

It himself calls a sexual malfunction to the difficulty during any stage of the sexual act (that includes desire, excitement, orgasm and resolution) that avoids the individual or couple the enjoyment of the sexual activity.

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