Because my older sister sat down when she peed, I assumed that females eliminated all waste (pee AND poo) from their anus. I held this belief even though--at 13--a diagram of the female body in my health ed class had something on it called the "urethra." It still didn't register. (My female friends finally straightened me out one night during a "pressing matters" chat session, after laughing until they--quite fittingly--almost peed their pants.) I was 18!!!
A childhood belief about weeing and pooing

others believed things like this
- I used to think that to desex an animal meant to turn it from a male to a female or female to male.— Phil
- I believed that female teachers got to choose if they wanted to be called "mrs. or miss" — Jenna
- The more you cried, the less you peed.Anon
- I used to belief that women had babies by pressing their belly buttons!— amy
- I used to think girls peed from their butt.— Neil
- I was scared that if I peed too much, the toilet would flood— scarlett