Heh, I like that!
I've been having a bunch of weird symptoms, and my gastroenterologist ran tests for a bunch of other autoimmune disorders (I already have ulcerative colitis), including lupus and a lupus-like disease. When he told me the results were negative, I jokingly said, "Well, of course it's not lupus. Have you ever watched House? It's never lupus!"
I think humor is a really good tool in dealing with chronic illnesses. I make poop jokes and cripple jokes about myself all the time, and it really does make me feel a little better.