When I was 7, I was told by a classmate that having sex was when a man got on top of a woman, and both had to be naked. I thought that a man had to climb on top of her literally, like him having to stand on her shoulders. I thought about that for a while and realized that standing would be too difficult, so I came to the conclusion that the man had to sit on the womans shoulders. I thought sex was hard work to accomplish.
I used to think that position must be very akward since a man is much stronger than a woman and better able to support her weight. I thought it should have been vice-versa, with the woman sitting on top of the man.
I don't know why I never thought of them laying down first, THEN the man laying on top of the woman.
Truthfully, when I was a few years older and found out how it actually was done, I was relieved.
A childhood belief about sex

others believed things like this
- I thought the line in the song "more than a woman" was "four-legged woman".— boo
- I used to believe once a man and a woman lay naked caressing each other, the woman would be pregant— oiman
- My sister just recently realized that the lyric "more than a woman" wasn't 4 letter woman!— Anne
- 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 think that the song "Evil Woman" was "Medieval Woman". Anon
- Met a man who thought every woman could give milk, whenever, wherever.— Missed that bullet