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9780199931583

Gay, Straight, and the Reason Why The Science of Sexual Orientation

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  • ISBN13:

    9780199931583

  • ISBN10:

    0199931585

  • Edition: 1st
  • Format: Paperback
  • Copyright: 2012-09-01
  • Publisher: Oxford University Press
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Summary

What causes a child to grow up gay or straight? In this book, neuroscientist Simon LeVay summarizes a wealth of scientific evidence that points to one inescapable conclusion: Sexual orientation results primarily from an interaction between genes, sex hormones, and the cells of the developing body and brain. LeVay helped create this field in 1991 with a much-publicized study in Science , where he reported on a difference in the brain structure between gay and straight men. Since then, an entire scientific discipline has sprung up around the quest for a biological explanation of sexual orientation. In this book, LeVay provides a clear explanation of where the science stands today, taking the reader on a whirlwind tour of laboratories that specialize in genetics, endocrinology, neuroscience, cognitive psychology, evolutionary psychology, and family demographics. He describes, for instance, how researchers have manipulated the sex hormone levels of animals during development, causing them to mate preferentially with animals of their own gender. LeVay also reports on the prevalence of homosexual behavior among wild animals, ranging from Graylag geese to the Bonobo chimpanzee. Although many details remain unresolved, the general conclusion is quite clear: A person's sexual orientation arises in large part from biological processes that are already underway before birth. LeVay also makes it clear that these lines of research have a lot of potential because, far from seeking to discover "what went wrong" in the lives of gay people, attempting to develop "cures" for homosexuality, or returning to traditional explanations that center on parent-child relationships, various forms of "training," or early sexual experiences, our modern scientists are increasingly seeing sexual variety as something to be valued, celebrated, and welcomed into society.

Author Biography

Simon LeVay, PhD, is a British-born neuroscientist who has served on the faculties of Harvard Medical School and the Salk Institute for Biological Studies. He has written ten previous books, including the textbook Human Sexuality (Sinauer, 4th edition, 2012) and the New York Times best-seller, When Science Goes Wrong (Penguin, 2008).

Table of Contents

Introductionp. vii
What Is Sexual Orientation?p. 1
Why We Need Biologyp. 27
The Outline of a Theoryp. 45
Childhoodp. 73
Characteristics of Gay and Straight Adultsp. 97
The Role of Sex Hormonesp. 129
The Role of Genesp. 157
The Brainp. 191
The Bodyp. 221
The Older-Brother Effectp. 247
Conclusionsp. 271
Glossaryp. 297
Notesp. 309
Bibliographyp. 331
Author Indexp. 393
Subject Indexp. 397
Table of Contents provided by Ingram. All Rights Reserved.

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