I used to chew my hair a lot (not sure why...), until an older friend of mine told me that you shouldn't chew your hair because if you swallowed too many hairs you'd get a hairball in your stomach, and have to have surgery to get it removed.
I woke my dad up that night crying because I'd swallowed a hair and thought I was going to have to have surgery...
A childhood belief about hair

others believed things like this
- I was told that if you chew your hair you end up with a hairball in your stomach and DIE!!!!!— Cat
- I used to think that everybody's hair was black and if you had blond hair, you dyed your hair.— ~_~CoolKid93_~_
- When I was little I thought that dying your hair means you kill your hair.Anon
- i was told when i was young that if i swollowed gum my stomach would grow teeth to chew it— gammie
- I used to hold my hand over my hair whenever i left the house and it was windy incase my hair blew away— lisa
- I used to believe that you could curl your hair by twirling a strand of hair wrapped around your finger— Anonymous