Some psychologists believe gay men’s apparent attraction to masculinity stems from a general tendency for people to eroticize traits that are different from their own-the “ exotic becomes erotic” theory, as it’s known. The basic idea is that the people you feel most different from in childhood become the target of your later sexual attractions, with gender non-conformers tending toward same-sex attractions and gender conformers tending toward opposite-sex attractions. The evidence for this, though, has been elusive. Also, there are other possible explanations. For example, maybe gay men’s preference for masculinity stems from a general societal devaluing of femininity or internalized homophobia.