9. You can catch warts from a frog.
This one is a funny superstition, but nothing more than that: a superstition. Bumps on the amphibians’ skin have no relation to human warts, which are caused by the human papillomavirus (or HPV). It’s still not a good idea to go around kissing frogs, mind you.
As for regular human warts, those are transmitted from person to person. Not necessarily through direct contact, more often through shared objects: towels, bath mats, footwear – anything that tends to be moist and warm. Small cuts, scratches and hangnails are a gateway for the virus, that’s why so many people have warts on their hands.