I don't even remember the reason, but one time I was out with a friend. I had just gotten a new shirt, and wanted to put it on. So I did. In front of my friend and tons of other people waiting at stop lights in a busy intersection. I had just taken my old shirt off and was sitting there with just my bra on. An old man in the car next to us looked over with a very confused expression. We laughed and drove off!