Thats what evolutionary biologists have been trying to figure out with little success. The case of the female orgasm bias in the science of evolution by elisabeth lloyd, ph. Science is finally filling us in on the science behind how and why women have orgasms. The female orgasm has always been a huge mystery, beguiling horny dudes and scientists alike since the dawn. nearly 75 of women who were in a relationship, on the other hand, had an orgasm during sex. As it turns out, during orgasm some women (10-40 per cent) experience the involuntary emission of fluid ranging from 30 to 150ml. Between the screams and the fireworks, an orgasm can be very different for women and people with clitorises and vaginas. Coming to power womens fake orgasms and best orgasm experiences illuminate the failures of (hetero)sex and the pleasures of connection, culture, health, and sexuality (2014) 16974. A brain scanning study showed that many areas of womens brains were deactivated during orgasm, including those involved in emotion. 30 women describe what an orgasm feels like to them and how they know theyre about to experience an orgasm whether from penetration or masturbation. It includes a series of muscle contractions in the sexual organs, lower pelvic muscles, and anus. Orgasm, also called climax, climactic physiological state of heightened sexual excitement and gratification that is followed by relaxation of sexual tensions and the bodys muscles. Orgasm is marked by a feeling of sudden and intense pleasure, an abrupt increase in pulse rate and blood pressure, and spasms of the pelvic muscles that cause contractions of the lower vagina in the female and.