Homosexuality as a phenomenon has existed probably as long as humans have walked the earth.  The term homosexuality, however, was not coined until 1869, and it has been commonly used in the English language only since 1905.  The many enigmas of sexual orientation that have baffled people for centuries - including what makes some children grow up to be homosexual, while others become heterosexual or bisexual, and to what degree gender identity is determined before birth - continue to do so.  John Money, one of the foremost investigators of human sexuality, cogently addresses many of these questions in this authoritative, thought-provoking book.  Drawing on case studies from his sexology clinic, he explores the diverse historical, cultural, and physiological influences that determine sexual orientation.

"Dr. Money is widely regarded as an original thinker and leading researcher in understanding the intricate links between anatomy, body chemicals, and life experiences in shaping sexual and gender identity and ability to function sexually." - Jane E. Brody, The New York Times

"John Money . . . is one of the most knowledgeable and respected men in [his] field." - Ann Landers, syndicated columnist

"[Money] address important scientific and social questions, and it is clear that he has devoted many years of thoughtful attention to them." - Journal of the American Medical Association

1. Prenatal hormones and Brain Dimorphism - historical and cultural relativity / preference versus status or orientation / evolutionary bisexuality / human intersexuality: group-comparison and matched-pair strategies / androgen-induced hermaphroditism / progestin-induced hermaphroditism / adrenogenital syndrome / adolescent gynecomastia / androgen-insensitivity syndrome / male hermaphroditism / Klinefelter's (47,XXX) syndrome / 47,XXX syndrome / Turner's (45,X) syndrome / epilogue and synopsis
2. Gender Coding - diecious and monecious / sex and gender / reductionism / sex-irreducible gender coding / sex-derivative gender coding / sex-shared, threshold-dimorphic gender coding / sex-adjunctive gender coding / sex-adventitious gender coding / identification and complementation / epilogue and synopsis
3. Gender Crosscoding - relativity of masculinity and femininity / prenatal proclivity and postnatal deflection / gender crosscodification classified / transsexualism / transvestophilia / gynemimesis/andromimesis / transvestism / homophilia / homo/heterophilia / postpubertal hormonal theories / concepts of determinism / epilogue and synopsis
4. Lovemaps and paraphilia - from gender transposition to lovemaps / normophilic and paraphilic lovemaps / lust, love, and paraphilia / six grand paraphilic stratagems / paraphilic pathology versus play / paraphilic compulsoriness / paraphilic addiction and opponent-process / phalaphilias: love maladies / politics of gay paraphilia / gay/lesbian paraphilic ratio / gender-crosscoded satellite stratagems / paraphilia and pornography / paraphilia, hypophilia, and hyperphilia / paraphilia: prevention and treatment / alphabetic list of paraphilias / epilogue and synopsis
5. Glossary