Ex's are like pennies found in the street, scratched and defaced and worthless. It's pointless to carry them in your pocket because they make noise take up space, are dirty and make your hand smell bad. I hate pennies as much as I hate ex's. Leave them in the tray next to the register for the next hapless passerby. Don't bend over for mere pocket change, wait until you find a hundred dollar bill for that. A hundred dollar bill found when least expected will make you happy, but stumbling over a penny on the sidewalk should make you pay no mind.