I used to believe that water from the drain in the bathtub all went to China. I've subsequentialy installed that belief in my own son and only today considered whether Chinese parents tell their children that water from the bathtub all flows to America.... hehehe
A childhood belief about bathrooms

others believed things like this
- how many us believed you would go down the drain with the bath water? I did!— Amy
- I used to think that trolls lived in my shower drain and showered with my dirty water— Troll bather
- I used to think the person who delivered Chinese food came all the way from China to do it.— Savana
- I used to believe that if I fell asleep in the bathtub I would wake up in the sea.— Brenda
- That there was a zombie living behind the bathtub in the upstairs bathroom.Anon
- I thought that hydrogen was pure water (since I knew hydro- meant water) and H2O was impure some how— Hexetic