A Pentagon study finds that “severe segregation” of the sexes contributes to “unusually common” homosexual behavior among Afghanistan’s Pushtun men. Ironically, Afghanistan is also one of the world’s most homophobic places, and as a result, the Pashtuns are “in almost complete denial” about their own proclivities. The Taliban, for example, are almost as well known for their frequent homosexuality as they are for their brutal killing of homosexuals. I’ve long suspected that societies — predominantly Islamic societies — that retard...