On Drums. And yet, scientists may have finally found its evolutionary roots. About time This biological role is still ongoing in some mammals, but humans have evolved out of it. Who'd have known!
Mystery of the female orgasm may be solved
The Evolutionary Reason Why Women Orgasm | Smart News | Smithsonian
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Sexual function: Electrode stimulation helps women orgasm
The female orgasm is a series of pleasurable physical sensations and feelings which occurs following, and represents the peak in, sexual stimulation. Orgasm in females is a complex multidimensional phenomenon involving both physical and emotional components. However, not a lot of research has been conducted about the female orgasm and the physical and emotional changes which accompany it are not properly understood.
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An orgasm in the human female is a variable, transient peak sensation of intense pleasure, creating an altered state of consciousness, usually with an initiation accompanied by involuntary, rhythmic contractions of the pelvic striated circumvaginal musculature, often with concomitant uterine and anal contractions, and myotonia that resolves the sexually induced vasocongestion and myotonia, generally with an induction of well-being and contentment. Women's orgasms can be induced by erotic stimulation of a variety of genital and nongenital sites. As of yet, no definitive explanations for what triggers orgasm have emerged. Studies of brain imaging indicate increased activation at orgasm, compared to pre-orgasm, in the paraventricular nucleus of the hypothalamus, periaqueductal gray of the midbrain, hippocampus, and the cerebellum. Psychosocial factors commonly discussed in relation to female orgasmic ability include age, education, social class, religion, personality, and relationship issues.