I used to believe that your tap water came from the swimmimg pool.
A childhood belief about swimming pools

others believed things like this
- When I was little, my dad told me that if you pee in the pool the water will turn purpleAnon
- I believed that the Kreepy Crawlie used to clean our pool, would follow me around the pool and eat me. — Mother-of-2
- I used to think that a "pool shark" was an actual shark that lived in a swimming poolAnon
- 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