My sister used to tell me that after swimming in the pool if I didn't wash my hair right afterwards then my hair would turn blue.
A childhood belief about swimming pools

others believed things like this
- I was told that if i didnt wash my hair regularly it would turn green— Mimi Screami
- My mom told me that if I didn't wash my hair black widow spiders would come live in it.— grew up in Nebraska
- I use to believe that your hair grew because you wash i.e like watering a plant — HJON
- I used to think that everybody's hair was black and if you had blond hair, you dyed your hair.— ~_~CoolKid93_~_
- My friend convinced me that if I used a bar of soap to wash my hair instead of shampoo that I would go bald.— Michelle
- I used to think that blue was a natural hair color but it as very rare, even rarer than ginger.Anon