Rex (another waiter on swing shift) and I were working the front two stations of a coffee shop one night, filling sugars when one of Rex's customers got up from the table with his pants and underwear around his ankles, shuffling toward the front door. He left the woman he was sitting with alone at the table - I don't know if it was a dare or he was just trying to embarrass her, but Rex started calling after the guy, "Sir! Sir! Sir!" He was really flustered, but of course nobody, Rex included, was gonna stop him from walking out 'cos we didn't want to touch a naked customer. I told Rex that we could all see the 'Sir' part, and he turned back around and said, indignantly, "I was trying to be polite!"
Rex was funny; kinda fastidious and I think he was from a small town and not really used to as much variety as we sometimes got at that restaurant. The funniest story he told on himself was when he bought a cock ring to wear under his jeans when he went out to the bars. He'd never owned one before, and he said the first time he had it on, he had just walked in the door of a bar and the ring - too large for him - slid off, and fell out the leg of his pants clattering on the floor behind him. Rex said, "I just kept on walking."