Leave it to Hugh Hefner to send out X-rated holiday cards. The Playboy founder’s greetings feature his twin "girlfriends" topless, reports Us magazine. In his signature robe, Hef is flanked by Karissa and Kristina Shannon “wearing” body-painted shirts with “Hef” emblazoned across their breasts. The pair look much happier than they did in their recent mug shots after they were busted for felony battery.