Are gay male couples a new thing, evolutionarily speaking? Simple logic would suggest that “gay genes” would not survive in the evolution of our species. Even if a homosexually-oriented man occasionally had sex with a woman, he wouldn’t be able to keep up, reproductively speaking, with a man who by virtue of “straight genes” felt highly motivated to bed women. And yet androphilic males—that is, males who are sexually oriented toward other males—show up in cultures around the world. Why?