It's amazing what people can do for superstition. By the way I have two two-dollar bills, It was a gift from my brother's wife, and until now I understand what she meant "do not go to eat at the one bite, save a little for tomorrow."
Hey this could be a topic for a post "superstitions and coins ... do you know any?
(And I don't think that microorganisms enjoy being kissed by strangers).