I think it's a tie between Ralph Malph and Potsie from Happy Days. Those two were so horny, I don't think they'll refuse to be bottoms or to service the Fonz's "prize", though. Though Chachi comes much closer to being horny. No wonder he has a silly grin on the time. Typical horny bottom he was. Though when Ted McGinley came in, Fonzie was no longer in control, anymore. Someone had to take the topping position for once as the show went on.