When I was a young girl of about the age of 4-5, I was told by my grandparents that if you wore a bathing suit into the bath tub while washing, potatoes would grow out of your ears and clog them up so you couldn't hear.
I don't know where in this world they got that idea from, but it was a good white lie to keep me from "swimming" in the bath tub.
A childhood belief about bathrooms

others believed things like this
- My uncle told me that if I didn't wash my ears when I took a bath, corn would start going out of them.— Ebod
- I used to think that when I was in the bath I shark lived under the bath and that ig might come up and bite me— ------------
- I used to think that if you take the plug out of the bath it will suck you into the bath— awesome kid
- Up until I was in 3rd grade I believed my bathing cap is what kept me afloat in the swimming pool! Anon
- I used to believe that my grandparents' world was in black and white.— Sara Serés
- When I was little my big brother told me that if I ate raw potatoes my teeth would grow curly. — Lauren