I have a really close friend that believed up until her early teens that you had sex through your urithra and peed through your vagina.When I confronted her about this she said,"Read the books if you don't believe me!"The reason she believed that is because she couldn't read the diagram correctly,and got the two holes backwards.
A childhood belief about rude bits

others believed things like this
- I BELIEVED THE TEACHERS COULD READ MY THOUGHTSAnon
- I thought vegetarians couldn't read Chicken Soup for the Soul. — Aretia
- when my friend was little, she used to eat paper, thinking it would make her read better.— hehehe
- i used to believe that women peed out of their arse and pooed out of their vagina— TIM wilson
- I once believed that one could run around the south pole in order to travel backwards and forwards in time.— kaibutsu
- when i was little i believed that leprecauns put the holes in crumpets.Anon