I read a kids' sex education book that gave most of the facts, but neglected to mention that sex does not result in pregnancy every time. For years I thought you couldn't have sex without having a baby, until my mum told me otherwise.
A childhood belief about getting pregnant

others believed things like this
- I thought my age started at 4, because I couldn't recall any mention of my age before.Anon
- Until I was five, I used to think that women gave birth to baby girls and men gave birth to baby boys— Cassidy K
- I used to believe if you read a book in the dark, you would go blind.— Ellen
- I read in a book that if you ever swallowed toothbrush bristles then you would get appendicitus!— Amy
- I thought vegetarians couldn't read Chicken Soup for the Soul. — Aretia
- My Mum told me if I ate too much toast I would get cancer! I couldn't eat it for years and years...— Pauliboy