Erotic slang words from Great Britain, Canada, the United States, Australia, and other English-speaking nations number well into the tens of thousands. But the history of terms used to describe the sexual activities of gays and lesbians have opposing sources: one, the discreet networks of gay men and lesbians who sought to come up with a new terminology for the pleasures of their secret lives; and the other, those who found gay sexuality repellent,...