When faced with the decision of which booth to support, for charity of course, I think I'd have to go with the biting booth. I've heard the theories about a dog's mouth being cleaner than a human's, but the stench of liver flavored dog treats overrides any fear I have of germs!
Link --via Tastefully Offensive
I'd take mild discomfort that fades away within minutes rather than have a moderate to intense pain that subsides after three to four hours.