I used to believe that sex was only done in the hospital, and doctors would watch as the couple had sex. I believed this until I was 13.
A childhood belief about sex

others believed things like this
- I used to believe that after 9 months, mothers went to the hospital to buy a baby off the doctors.Anon
- when i was 4 i believed i could breathe under water, one day i decided to try it and woke up in the hospital!Anon
- When I was 4, I thought you chose and bought your baby at the hospital. I believed this until I was 6.Anon
- that the word "couple" as in "a couple of items" was synonymous with "several", rather than "just two".— Blair A. Petterson
- I used to believe that doctors could not get sick.Anon
- I used to want to be a doctor when I grew up, because doctors never die, as they can cure themselves.— Stuart