My daughter-in-law believed that you couldn't take a bath or shower if the electricity was out.
It turned out that she grew up in a house that had well water and an electric pump that got the water into the house. So if there was a power outage, of course there was no water.
But even after she married my son, she still believed this. He had to explain that not every home uses well water, so showering was still an option even during a power outage.
A childhood belief about bathrooms

others believed things like this
- I used to believe that if i splashed water on the wall during a bath, the water would turn into spiders— justin
- I used to think that when the power goes out, the water also stops working.Anon
- how many us believed you would go down the drain with the bath water? I did!— Amy
- I thought that hydrogen was pure water (since I knew hydro- meant water) and H2O was impure some how— Hexetic
- 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