In pre-school and kindergarten, it was common knowledge that if you swallowed your gum, it would take 7 years to digest. Nobody would do it because we figured we'd run out of room for food after a while. Years later, people began to question it, but really no one was sure. I don't think I quit believing that until the middle of high school.
A childhood belief about chewing gum

others believed things like this
- I thought that wars had to last four years... just like high school and college.— A. Falk
- i used to believe it took 7 years to digest gum— lorenn
- It was common "knowledge" where I lived that if you picked dandelions then you would wet the bed.— Holly
- My mom used to think "preschool" was called "pretty school" until a few years later.— Molly
- I used to believe that you got married right after you finished high school or college. Anon
- When I was young, I honestly believed that I would die before I reached high school. Anon