When my cousin and I were 6 & 7 respectively, we went went to urinate together. He said, "all this pee in here makes my pee-pee stiff!" From that time until my early teens I thought it that whenever my penis would stiffen, it meant I had to urinate!
A childhood belief about weeing and pooing

others believed things like this
- My cousin's mom told my cousin that pop makes you short. He probably believed it.— Molly
- I used to think a second cousin meant a cousin’s cousin.— Carlos Almonacid
- When I was a kid, I thought the musical Mamma Mia did songs from the A*Teens (the teenage version of Abba)Anon
- I used to think that Frankie Avalon sang, "Hey Penis, Oh, penis..." instead of "Hey Venus."Anon
- I thought the lines in the sky left behind by airplanes were "sky scrapers". Makes sense.Anon
- my friend, up untill she was in her early 20s thought that if you drank gatorade you would sweat in colorAnon