When I moved in with Hunter, I guess I shouldn’t have been surprised that the issue of masturbation would come up pretty soon. But it didn’t happen the way I expected. I was making my morning coffee, on my second day in the apartment, when Hunter stepped into the kitchen. “By the way,” he said, “I’ve got a bate bud coming over tonight.” He said it so casually that his words didn’t fully register. But then I froze. “A what...