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These contractions move sperm not only into the uterus, but only, toward the more mature ovarian follicle, and women who are better at doing this are more likely to get pregnant, according to a study published in Animal Behaviour Vol. Pair that with research showing that uterine contractions intensify during the oxytocin release triggered by orgasm, and you have compelling evidence that the female orgasm, while certainly not necessary, can play a role in fertilization, says Komisaruk.
Taken together, the research suggests that many heterosexual couples share serious rigid fakes about the way sex should go — with a period of foreplay, followed by the woman peaking, then the man. Scientists are uncovering evolutionary roots and modern function of the female orgasm —and its fake counterpart. The other half the time, the female quivers, but never releases her eggs.
Feature Understanding orgasm Scientists are uncovering evolutionary roots and modern function of the female orgasm —and its fake counterpart.
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Sixty-seven percent of heterosexual women admitted to occasionally faking orgasm in a study published last year in the Journal of Sex Research Vol. Cooper, a clinical psychology doctoral student at Temple University.
It surveyed 86 heterosexual couples and found women have more orgasms with men whose bodies are more symmetrical. The finding lends support to the idea that women could fake orgasms to reassure or trick their partners about paternity, adds McKibbin. Komisaruk, B. Lloyd, E. Cambridge, Mass.
COVID resources for psychologists, health-care workers and the public. In addition, these women seem to be benefiting from an accident of physiology — they happen to have clitorises that are close to their vaginal opening, according to new research by Lloyd and Emory University psychology professor Kim Wallen, PhD, in press in Hormones and Behavior.
These women fake for their own enjoyment, and report heightened levels of arousal as a result. For animals in many species, symmetry serves as shorthand for genetic quality — asymmetry suggests that an organism has developed abnormally. Male fish respond by crouching and quivering beside her. In any of these cases, the root reason women pretend to have orgasms is to shore up the difference between expectations and reality, according to University of Kansas psychology professor Charlene Muehlenhard, PhD. Of the women who had ever feigned orgasm, 55 percent pretended in that scenario, as compared with just 8 percent during oral sex and 4 percent during manual stimulation.
It could also serve to reassure partners that they are, genetically speaking, high-quality males.
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Perhaps for both women and fish, fake orgasms are an unconscious fertility-related adaptation, he adds. Their quivering intensifies and, about half the time, they both climax.
By Sadie F. Cite this. Like Harry, 90 percent of men say they care if their partners have orgasms, and there may be a deeply rooted reason for that, according to a study by McKibbin, published in Personality and Individual Differences Vol. McKibbin and his colleagues surveyed heterosexual men in committed relationships, asking how much time they had spent with their partners since they last had sex.
‘fantastic bonus’ or fertility control?
Humans probably evolved in societies in which it was common for a woman to sleep with many men over a relatively short period of time, argues biologist Alan S. Male mountain gorillas, in comparison, face a low risk of sperm competition because they keep close watch over a harem of females, possibly explaining their relatively small testicles.
Some women, found Cooper, may be able to actually increase their sexual satisfaction by faking orgasm.
The event must be timed perfectly, so the female trout indicates she is about to release her eggs by digging a bed in the sand, crouching by it, opening her mouth and quivering. One possibility: Orgasms may allow women to make a subconscious last-minute call about whether they want to be fertilized by a particular partner.
The female evidence, she says, suggests the female orgasm is simply a byproduct of the only orgasm. Help us improve your experience by providing feedback on this. That faking might serve the purpose of allowing female trout to save their eggs for higher-quality males, a theory supported by the observation that serious trout fake more likely to fake orgasms when better-looking, more dominant fish lurked nearby.
In the past few years, however, scientists have conducted a slew of studies and written several books on the topic — with the function of female orgasms emerging as a particularly hot area of debate. Another research team, at the Universities of Erlangen and Gottingen, Germany, found through a series of studies that uterine contractions are the primary method of sperm transportation. Less commonly, women fake orgasm to avoid having difficult discussions with themselves, Cooper found.
In a study published in Animal Behaviour Vol. Brown trout reproduce externally — the male and female fish climax simultaneously and release their sperm and eggs into the open water.
Further reading Dixson, A. Max characters: Letters to the Editor Send us a letter. Dixson, A. Oxford: Oxford University Press. But why reward potential infidelity with orgasms? In support of the fantastic bonus theory, Lloyd points out that only about 8 percent of women reliably have otherwise unassisted orgasms during penile-vaginal intercourse, while nearly all men do.
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The male orgasm positively reinforces ejaculation and therefore encourages males to propagate the species, Lloyd says. More often, however, the females faked it when the males were not in the exact right position, says study author Erik Petersson, PhD, a biology professor at Uppsala University.