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Brain and unusual sexual behavior

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The hormonal theory of sexuality holds that, just as exposure to certain hormones plays a role in fetal sex differentiation , such exposure also influences the sexual orientation that emerges later in the adult. The hormonal theory of sexuality and gender identity holds that, just as exposure to certain hormones plays a role in fetal sex differentiation, such exposure also influences the sexual orientation and or gender identity that emerges later in the adult. Differences in brain structure that come about from chemical messengers and genes interacting on developing brain cells are believed to be the basis of sex differences in countless behaviors, including sexual orientation. As seen in young children as well as in vervet and rhesus monkeys, sexually differentiated behavior in toy preference is differing in males versus females, where females prefer dolls and males prefer toy balls and cars; these preferences can be seen as early as 3—8 months in humans. An endocrinology study by Garcia-Falgueras and Swaab postulated that "In humans, the main mechanism responsible of [ sic ] sexual identity and orientation involves a direct effect of testosterone on the developing brain. Sketching the argument briefly here, the authors say that sexual organs are differentiated first, and then the brain is sexually differentiated "under the influence, mainly, of sex hormones such as testosterone, estrogen and progesterone on the developing brain cells and under the presence of different genes as well
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Uncontrollable sexual urges may be found in our genes

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a book review by Carol Katz: The Disordered Mind: What Unusual Brains Tell Us About Ourselves

By Tracey Cox for MailOnline. This week, I thought I'd give a salute to the strange-but-fascinating side of sexual practises. Human sexuality really is diverse — and perverse! Virginity was revered by ancient and not so ancient cultures and each developed its own method of virgin authenticity. The Incas in South America believed the breath of a virgin could ignite a smouldering fire. An evil non-virgin was brought in to put the fire out.
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Hot Stuff? 10 Unusual Sexual Fixations

It takes a tragedy like the abrupt end of a successful, decade-long presidency at a major university to focus public attention on the problems of unusual sexual behaviors that, in the extreme, are considered to be a form of mental illness. Recently, it was disclosed that Richard E. Berendzen, 51, resigned as president of American University because of accusations that he made obscene phone calls to women running day-care centers in Northern Virginia.
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An authoritative tour of the brain. Groundbreaking research into how the brain processes information. Have you ever wondered how a typical brain functions and what happens when its normal activity goes awry? The book is divided into eleven chapters, each describing a disorder, its historical background, biological basis, regions of the brain that are affected, genetic components, what it teaches us, available treatments and what to expect in the future.
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