I always thought that your bum cheeks were full of poo. Therefore if you had a big bum you hadnt been to the loo for a very long time
A childhood belief about weeing and pooing

others believed things like this
- Before I went to a planetarium for the first time, I thought it was just a room full of plants. Anon
- I use to believe I had holes in my bum cheeks for my farts to come out— jackL
- i used to think that your butt cheeks is where your poop was stored. Anon
- when i was younger i thought ac/dc's dirty deeds (done dirt cheap), was dirty knees and the thunder cheeks.— S
- I used to believe that i was turning into a clown whenever I cried becase my cheeks and nose would become red— melissa
- I thought if someone worked full time it meant they worked 24/7 and never did anything else!— andalite