All I knew that was different between a man and a woman when i was little was that a man stood up to go to (use) the bathroom and a woman had to sit down. So I came to the conclusion that also men didn't poop because that would mean they would have to sit do it.
A childhood belief about weeing and pooing

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 the song "Evil Woman" was "Medieval Woman". Anon
- When I was little, I thought that since boys stood up to pee, they could stand up to poop.— Lacey
- I used to think Hannah Barbera was one woman...not two men. I didn't figure it out until I was about 15!— minkie
- We knew a woman named Barbara Hannah, and I thought she was was in charge of Hannah-Barbara!Anon