In my first sex ed class they taught us about ejaculation but didn't explain the specifics. Until I got old enough and started "experimenting", I thought that the man had to pee in the girl to get her pregnant.
A childhood belief about getting pregnant

others believed things like this
- Premature ejaculation was when you came before you reacher pubertyAnon
- I used to think "premature ejaculation" was a boy ejaculating before he hit puberty.Anon
- I remember a girl in my kindergarten class told me she wanted to be a waterfall when she grew up.Anon
- A girl could get pregnant going to the bathroom after a boy.— Brandy Gallop
- when i was 7ish i used to think that you got a girl pregnant by peeing in them— nick
- i used to believe a girl will pregnant if kissing a boy on the face— mulan