Bisexuality passed on by 'hyper-heterosexuals' - being-human - 15 August 2008 - New Scientist

“It helps to answer a perplexing question – how can there be ‘gay genes’ given that gay sex doesn’t lead to procreation?” says Dean Hamer of the National Institutes of Health in Bethesda, Maryland, who was not involved in the work. “The answer is remarkably simple: the same gene that causes men to like men also causes women to like men, and as a result to have more children.”


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