Human  female cumshot
In a human female orgasm, orgasm is preceded by moistening of the vaginal walls, and an enlargement of the clitoris due to increased blood flow trapped in the clitoris's spongy tissue. Some women exhibit a sex flush; a reddening of the skin over much of the body due to increased blood flow to the skin. As a woman comes closer to having orgasm, the clitoris moves inward under the clitoral hood, and the labia  female cumshot (minor lips) becomes darker. As orgasm becomes imminent, the vagina decreases in size by about 30% and also becomes congested with blood. The uterus then experiences muscular contractions. A woman experiences full orgasm when her uterus, vagina and pelvic muscles undergo a series of rhythmic contractions.

After the orgasm is over, the clitoris re-emerges from under the clitoral hood, and returns to its normal size in less than 10 minutes. Unlike men, women either do not have a refractory period or have a very short one, and thus can experience a second orgasm soon after the first; some women can even follow this with a third, or even fourth orgasm; this is known as having multiple orgasms. Research shows that about 13% of women experience multiple orgasms; a larger number may be able to experience this with the proper stimulation (such as a vibrator) and frame of mind. However, some women's clitorises are too sensitive after orgasm, making additional stimulation painful; they are probably not able to experience multiple orgasms.

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The purpose of orgasms
Debate rages over the "purpose" of female orgasms. Many different theories have been advanced by different scientists, feminists, doctors, and religious groups. Some feminists have even made the case that there is no such thing as a male orgasm.

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Evolutionary theories
Some evolutionary biologists believe that female orgasms have a distinct purpose, such as increasing intimacy with a male partner in order to ensure the survival of the pair bond. Others have theorized that they increase fertility by enhancing sperm retention. The British biologists Baker and  female cumshot have suggested that the female orgasm may have an " female cumshot" action, retaining  female cumshot sperm and making conception more likely. Conversely, writers such as evolutionist Stephen Lay Gould of Harvard, suggest the the female orgasm is analogous to the male nipple, an evolutionary "hang-over" which, though  female cumshot with pleasure in the context of sexual  female cumshot, has no specific identified biological function.

The clitoris is homologous to the penis, that is, the penis and clitoris develop from the same embryonic structure. It has been claimed by some researchers, such as Stephen Jay Gould that the clitoris is vestigial in the female, and that female orgasm serves no particular evolutionary function. Proponents of this theory, such as Dr. Elisabeth Lloyd, point to the relative difficulty of achieving female orgasm through vaginal sex, and limited evidence for increased fertility after orgasm. Feminists such as Natalie Angier have criticized this theory, because it understates the value of female orgasm.

33% of women report never or seldom achieving orgasm during intercourse, and only 10% always orgasm. This variation in ability to orgasm is generally thought to be psycho-social, but has been found to be between 34-45% genetic, according to a 2005 twin study published in Biology Letters, a Royal Society journal.[2][3][4] The researchers stated that the fact that it is heritable suggests that evolution has a role. They suggested this difficulty in achieving orgasm might have evolved because it helped females select males who were the most powerful and thoughtful, who would be the most likely to hang around as a long-term partner and be a better bet for bringing up offspring. In this theory, women who orgasm easily may have been satisfied with mates who were less skilled in bed. While anecdotal evidence does suggest greater promiscuity among women who are more orgasmic, there has to date been no confirmation of this in a scientific study.

Female ejaculation
Some women experience an expulsion of fluid during orgasm. In many cases the origin of this fluid is the  female cumshot glands. For further details, see female ejaculation. An unconfirmed sexologist has claimed that of 1 out of 25-30 women have experienced a forceful discharge of fluid during orgasm.

Vaginal versus clitoral orgasms
A distinction is sometimes made between clitoral and vaginal orgasms in women. An orgasm that results from combined clitoral and vaginal stimulation is called a blended orgasm. Many doctors and feminist advocates have claimed that vaginal orgasms do not exist, and that female orgasms are obtained only from clitoral arousal. Recent discoveries about the size of the clitoris — it extends inside the body, around the vagina — would seem to support this theory. On the other hand, other sources argue that vaginal orgasms are dominant or more "mature."

This latter viewpoint was first promulgated by Sigmund Freud. In 1905, Freud argued that clitoral orgasm was an adolescent phenomenon, and upon reaching puberty the proper response of mature women changes to vaginal orgasms. [5] While Freud did not provide evidence supporting this basic assumption, the consequences of the theory were greatly elaborated thereafter.

In 1966, Masters and Johnson published pivotal research into the phases of sexual stimulation. Their work included women as well as men, and unlike Kinsey previously (in 1948 and 1953), set out to determine the physiological stages leading up to and following orgasm. [6] One of the results was the promotion of the idea that vaginal and clitoral orgasms follow the same stages of physical response. Additionally, Masters and Johnson argued that clitoral stimulation is the primary source of orgasms.

This standpoint has been adopted by feminist advocates, to the extent that some hold that the vaginal orgasm was a mirage, created by men for their convenience. Certainly many women can only experience orgasm with clitoral stimulation, either alone or in addition to vaginal stimulation, while (less commonly) other women can only experience orgasm with vaginal stimulation. The clitoral-only orgasm school of thought became an article of faith in some feminist circles. Alternatively, some feminists instead feel the clitoral orgasm robs females of the source of the womanhood.

A new understanding of vaginal orgasm has been emerging since the 1980s. Many women report that some form of vaginal stimulation is essential to subjectively experience a complete orgasm, in addition to or instead of external (clitoral) stimulation. Recent anatomical research has pointed towards a connection between  female cumshot tissues and the clitoris. It has been shown that these tissues have connecting nerves. This, combined with the anatomical evidence that the internal part of the clitoris is a much larger organ than previously thought could also explain credible reports of orgasms in women who have undergone  female cumshot as part of so-called female circumcision.

In some cases it is possible for women to orgasm through stimulation of secondary sexual organs (eg breasts), and in very rare cases, without any direct stimulation to the genitalia or the other specific erogenous zones, but instead stimulation of the non-specific zones (e.g. neck).

Controversy: definition of orgasm
There is controversy surrounding male multiple orgasms, and female G-spot (vaginal, not blended) orgasms, because some feel that they do not fit within the clinical definition of orgasm. Male multiple orgasms, while pleasurable, often do not involve involuntary contractions. Similarly, there are not always contractions in female orgasms resulting from stimulation of the g-spot alone, without stimulation of the clitoris. However, both of these sensations in both sexes are extremely pleasurable, and are often felt throughout the body, creating a mental state that is often described as transcendental. Because of this, some sexologists feel that these experiences can be accurately defined as orgasms. Others insist that that orgasm is defined by strictly by muscular contractions, and that these other sensations are too subjective to be quantified as orgasms..

Orgasm in post-operative transsexuals

 female cumshot
Post-operative male-to-female transsexual women (having undergone  female cumshot) generally experience full orgasm, involving any combination of the clitoris, vagina and labia.

Many  female cumshot experience female ejaculation, which can be from the prostate gland, seminal vesicles, and/or Cowper's glands, which are not removed during  female cumshot.

 female cumshot
Post-operative female-to-male transsexual men (after having undergone  female cumshot or  female cumshot) generally experience orgasm in the same way as natural men, except that those who have had  female cumshot have a pump installed to create an erection, as the  female cumshot (with either surgical technique) has limited natural erection capability. Due to the lack of male glands, they do not have the ability to ejaculate.

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Orgasmic dysfunction
The inability to have orgasm is called  female cumshot, or  female cumshot In situations where orgasm is desired,  female cumshot is mainly thought of as being caused by an inability to relax, or 'let go'. It seems to be tightly associated with performance pressure in intercourse, and an unwillingness to pursue pleasure as such, as separate from the other person's satisfaction.

For a variety of reasons, some people choose to fake an orgasm.

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Drugs and orgasm
Certain drugs have been reported to have enhancing effects on orgasm. Amyl Nitrate is used by some men to enhance orgasm. Marijuana has widely been reported to enhance and prolong male orgasms. Cocaine users of both sexes report heightened sexual pleasure. Some male cocaine users report rubbing the  female cumshot of their penis with cocaine in order to numb it and delay ejaculation. All of these practices have potentially hazardous side effects.

Studies have indicated that each of the three major Erectile Dysfunction drugs have different reported effects on orgasm. Anecdotal evidence suggests that women have enhanced orgasms with Viagra. In men Viagra has varying effects on orgasm. Some men report enhancement, while others report that while they can achieve an erection with Viagra, their orgasms feel "hollow".  female cumshot behaves very similarly to Viagra.  female cumshot, a newer drug, in addition to treating erectile dysfunction over longer periods of time, is known to enhance orgasm and shorten the male refractory period.

While prescribing drugs to solve problems, many sex therapists discourage the regular use of drugs to enhance sex, because of the elevated risk of dependency.