I used to think that poop was stored in your buttocks and that's why they're squishy.
A childhood belief about weeing and pooing

others believed things like this
- i used to think that your butt cheeks is where your poop was stored. Anon
- I used to believe pee was stored in your stomach and poo was stored in your back.— Rob
- i used to believe that people's buttocks were plump because of the poo filled in it— Diesa
- Since my father had a deep cleft in his chin, I thought he was growing a tiny buttocks out of his face.— Rick
- I actually asked my mother if mixing girls' poop and boys' poop would cause an explosion.— kraine
- When I was little I thought that my urine was stored in my scrotum until I needed to wee.— Bryan