When I was a little kid, I believed that erections were caused by the need to urinate.
A childhood belief about rude bits

others believed things like this
- I believed that wind was caused because the trees moved. I was completely sure my conclusion was correct.— Glenr
- My mom used to tell me that ice cream caused polio.Anon
- I used to think that rain was caused by the sun peeing on us.Anon
- I used to think that the wind was caused by all the trees waving about.— dismal dunc
- When I was little, my mom told me that too much ice cream caused polio!— Angie
- I used to think that clouds were caused by cigarette smoke— Monkey Dave