Was in a pub once and went to the bathroom, one with one urinal and one seat. I was using the stand-up and the seat stall was empty, when this guy comes in and stands right behind me. I'm thinking 'you likely don't have a urinal at home, why don't you just use the regular toilet?' When I looked behind me he had this lascivious look in his eyes and crooked grin on his face. I was about to make the obvious sarcastic comment but thought that might not be smart as he might be a loon. So I finished up and left. :P