1. A majority of U.S. bills tested positive for cocaine.
2. 94% of U.S. bills tested positive for staphylococcus (including fecal matter).
3. Many U.S. bills have more germs than a typical U.S. toilet.
4. U.S. bills have been shown to transport the live flu virus 17 days after initial contact.
If you're not willing to lick the toilet, you shouldn't be willing to eat after handling money. Teach this to your kids and help them develop good hygiene.