Having watched my mother test the temperature of the water by running her fingers under the hot tap, I used to believe that was how the water was actually heated, and spent quite some time wondering why my fingers wouldn't heat the water up.
A childhood belief about bathrooms

others believed things like this
- I used to think what heated the food in the pan was the boiling water, not the heat under it.— Mario
- I thought that hydrogen was pure water (since I knew hydro- meant water) and H2O was impure some how— Hexetic
- I used to believe that if i splashed water on the wall during a bath, the water would turn into spiders— justin
- that bathroom tap water was recycled "potty" water from the toliet. — livingdeadgirl
- ***I used to believe that water towers was a place that someone lived and they controlled the water.— C H R I S T E N
- I didn't think you could put out a fire with hot water - only cold water would do.— Katti Pytt