This reminds me of a time I was with some people from a student group at college walking around the streets at night (we were chalking some kind of advertisement on the sidewalk), and this one guy and one of the girls were talking about what they would do when they got back to the apartment we had been meeting at. He asked her if they should help each other pee, or something along those lines, and when she said nothing, he said "because I really need to pee", as though the suggestion had been a joke that he'd just made to tell her that. Neither of them peed for the rest of the time we were out