We used to beleive that the testicles were wee bags - the larger they were, the more you needed to go...
A childhood belief about rude bits

others believed things like this
- I thought brown paper grocery bags would fit more than plastic grocery bags.Anon
- Since lions and tigers are larger versions of cats, I used to believe bears were large dogs— Chris Ayala
- I used to believe as a child that t-storms (aka thunderstorms) where actually tea bags falling from the sky.— Samantha
- when i was a child (of course)i used to believe that the sea is salty because God throws bags of salt into it.— Kafka
- i believe in the tooth fairy so much that i make paper bags for her!— Monster High girl
- I used to think pee was in your testicles.— R.G.