And now a risque joke (ie not an anecdote) since I've handed up my second (and last) term paper. I couldn't find the phrasing in which I first heard it, so I have taken the liberty of reconstructing it as best I remember:
I went over to my sister and asked her,
"Would you wear gloves if you had no hands?"
"No, why do you ask?"
"So why do you wear a bra?"
I ducked for cover as a cushion flew at my head.