During 69, a man sticks his tongue up another man's asshole, causing the guy getting rimmed to shit in his partner's mouth.
Prince Edward asks his butler: "But I thought a sloppy aardvark was between a man and a woman?"
Butler: "No, Your Highness, you are welcome to do it to me."
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi