My older sister and I found my dad's secret stash of "girlie" magazines one day. One picture portrayed a man with his penis in the woman's mouth, while another portrayed a woman with her mouth on another woman's wet-looking lower extremities.
It was a long time before I realized that they weren't allowing other people to pee in their mouths. (Boy was I disgusted at first.)
A childhood belief about sex

others believed things like this
- My sister just recently realized that the lyric "more than a woman" wasn't 4 letter woman!— Anne
- I thought the line in the song "more than a woman" was "four-legged woman".— boo
- I used to think that if a black woman or man and a white woman or man had a baby, it would be Asian.Anon
- I used to believe once a man and a woman lay naked caressing each other, the woman would be pregant— oiman
- I used to think that the song "Evil Woman" was "Medieval Woman". Anon
- I used to believe that a baby's sex was determined by whether the sperm had a picture of a man or woman on it.— David E.