||What is sexual orientation? -- Why we need biology -- The outline of a theory -- Childhood -- Characteristics of gay and straight adults -- The role of sex hormones -- The role of genes -- The brain -- The body -- The older-brother effect -- Beyond gay and straight -- Conclusions.
||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. In this revised edition LeVay broadens his horizons. He adds a new chapter on bisexuality, reviews some uncommon forms of sexuality such as asexuality and pedophilia, and considers whether there could be a biological basis for subtypes of gay people such as "butch" and "femme" lesbians.
|Bibliography note||Includes bibliographical references and indexes.|
|Issued in other form||Electronic version: LeVay, Simon. Gay, straight, and the reason why. Second revised edition. Oxford ; New York : Oxford University Press,  9780190297381|
|ISBN||9780190297374 (pbk. ; alk. paper)|
|ISBN||0190297379 (pbk. ; alk. paper)|