This doesn't have anything really to do with costumes, but when I was about five months pregnant, I was riding my bike with husband, and man did I have to pee!! So I parked my bike behind some bushes behind a church, and went potty! The next thing I know, my butt was itching like crazy about two hours later...and it turned out after a few days of being all over, I had poison ivy!! How embarrassing is it to tell you baby dr you have poison ivy on your butt?? LOL It was awful!!!