Ah, Zirk. I always got the feeling that he just sort of slimed his paramours. (There was a strip where someone tried to trap him and ended up getting the tables turned on her, and a later strip showed her compulsively reliving the experience, with several nozzles spraying this mucusy goo all over her. Laser Eraser and Pressbutton, folks--not your high-minded end of the sci-fi spectrum.)