During my mother's pregnancy with my youngest brother, they bought a book and talked to me and my two brothers about sex and where the new baby came from. From then on I believed that my parents only had sex four times - once for each kid they had. I thought sex automaticly resulted in kids untill 7th or 8th grade.
A childhood belief about reproduction

others believed things like this
- When I was 4, I thought you chose and bought your baby at the hospital. I believed this until I was 6.Anon
- Up to the age of 12 I was convinced urinating while in mid copulation resulted in a Downs Syndrome baby.— Nathan Harlow
- When I was younger, I believed that times tables in maths were kids sitting at tables staring at clocks!Anon
- First I believed that my parents were brother and sister. Then I thought that my dad was also my mums dad. — Rainbow
- I used to think that people who got married had babies automaticly, unless they had a medical disorder— Angela
- When I was little I believed that the mother vomited the baby. Anon