I used to believe (and apparently told a friend of mine) that you had to have sex for 24 hours to get pregnant.
A childhood belief about sex

others believed things like this
- In kindergarden my friend told me that there were 24 hours in the day and 15 hours in the night.— Cari
- A friend of mine used to think that you got pregnant from eating baby food.— Jemima
- a friend of mine thought that you could get pregnant by swallowing sperm. Ha!Anon
- a male friend of mine used to think that only women who had been pregnant had periods— oiman
- My friend's sister believed the lyrics to Gazza's "Fog on the Tyne" were "Fog on the dinasaurs mine all mine"— Suzanne
- I used to believe that you had to have sex for 24 hours to get pregnant.— Heather