Americans, mostly children, do silly things to each other. They even have names for them; for example, wedgie, wet-willy, knat/thomp, indian burn, nookie, dutch rub; and many more.
What are these things you may ask? A wedgie is pulling someone's underpants up real tight. A wet-willy is wetting your finger in your mouth and sticking it in someone's ear.
So, do Russian kids do these things? What other weird things do they do? And what are they called? If I ever go to Russia, I don't want to be surprised!