And then there was the time that one of the housemates decided that he had scurvy. It seemed pretty unlikely, since he intentionally took Vitamin C every day of his life, and didn't have all that bad a diet either, but he insisted, and I couldn't bring myself to care. Well, I didn't care, until I took him to a party at a friend's house and she took one look at him and said "What is he doing here with chicken pox?"