Neurology is just like everyone else, that is, it's just as interested in sex too. But these scientists focused particularly on what occurs in the brain during an orgasm. Not surprisingly, for men "researchers saw extraordinary activation of the ventral tegmental area (VTA), a major hub of the brain’s reward circuitry; the intensity of this response is comparable to that induced by heroin." For women a surprisingly indifferent result occurred. Indifferent in that, as neuroscientist Gert Holstege declared at a meeting:
At the moment of orgasm, women do not have any emotional feelings.
What scientists discovered was that to achieve orgasm, beyond "tactile and visual stimuli" it "requires a release of inhibitions engineered by shutdown of the brain’s center of vigilance in both sexes and a widespread neural power failure in females."
The study and article however does not answer the question: Why won't she call???
Read more here.