I thought that your body is hollow and that your food just sat in there and you slowly fulled up.Then when you got filled up you just emptied yourself in the toilet.
A childhood belief about eating

others believed things like this
- I used to believe that as I ate food, I filled up, and that once I filled up completely, I would die. Anon
- I used to beleive, that if you swallowed a seed the food would grow in your body.Anon
- when i was young i thought that a giant made the world slowly spin!— ~kassie~
- I thought everyone only had a set number of breaths before they died.
I breathed slowly for a long time.Anon - I used to believe that cow udders were hollow bags full of milk.Yet I knew that human boobs were solidAnon
- I thought when you got food poisoning it might someone had put poison in your food— Bootlebat