By Simon LeVay
What explanations a baby to develop up homosexual or immediately? during this ebook, neuroscientist Simon LeVay summarizes a wealth of clinical facts that issues to 1 inescapable end: Sexual orientation effects essentially from an interplay among genes, intercourse hormones, and the cells of the constructing physique and brain.
LeVay helped create this box in 1991 with a much-publicized examine in technological know-how, the place he suggested on a distinction within the mind constitution among homosexual and immediately males. when you consider that then, a whole medical self-discipline has sprung up round the quest for a organic rationalization of sexual orientation. during this booklet, LeVay offers a transparent clarification of the place the technological know-how stands this present day, taking the reader on a whirlwind travel of laboratories focusing on genetics, endocrinology, neuroscience, cognitive psychology, evolutionary psychology, and kinfolk demographics. He describes, for example, how researchers have manipulated the intercourse hormone degrees of animals in the course of improvement, inflicting them to mate preferentially with animals in their personal gender. LeVay additionally reviews at the incidence of gay habit between wild animals, starting from Graylag ducks to the Bonobo chimpanzee.
In this revised variation LeVay broadens his horizons. He provides a brand new bankruptcy on bisexuality, studies a few unusual sorts of sexuality comparable to asexuality and pedophilia, and considers even if there can be a organic foundation for subtypes of homosexual humans equivalent to "butch" and "femme" lesbians.
Although many information stay unresolved, the overall end is sort of transparent: A person's sexual orientation arises largely from organic methods which are already underway sooner than birth.
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Extra resources for Gay, Straight, and the Reason Why: The Science of Sexual Orientation
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