I used to believe that if you swam in a pool when you had your menstrual cycle and leaked you would go into shock and possibly die.
A childhood belief about swimming pools

others believed things like this
- 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 believe that i swam more than 2 hours I would become a mermaid.— M11cazares
- that DOT was a particularly popular brand of motor cycle helmet.— Gary Watrous
- I thought ducks couldn't fly - thats why they swam.— G
- I used to think that a "pool shark" was an actual shark that lived in a swimming poolAnon
- I used to believe that Off Air was an actual show, possibly about airplanes.— Gretchen