When I was little my half-sister told me that your body had all your poo stored inside in "poo bags", and that when your body needed to poo one was released. For years I was convinced that I was full of poo.
A childhood belief about weeing and pooing

others believed things like this
- I used to think that "extra body" shampoo meant you could use the runoff suds to clean your body.— Christy
- I used to believe in the 'little men' that worked inside your body.Anon
- I used to believe that when there was static on the tv, it would be showing the inside of your body.— Dr.Starr2.0
- I used to believe that the inside of my body looked like bologna.— Stephenie
- When I was little I thought that my urine was stored in my scrotum until I needed to wee.— Bryan
- I used to believe that ants walked inside your body and that's what caused an itch.Anon