I was told that if you swallowed a piece of gum, it would stay in your stomach for 7 years.
A childhood belief about chewing gum

others believed things like this
- I believed the urban legend that gum stayed in your stomach for 7 years if you swallowed it.— Lindsay
- I used to be scared that if I chewed my cuticles and swallowed a piece of skin, I would become a cannibal. Anon
- my mom made me believe that if i swallowed my chewing gum, it would form one big wad in my stomach.— mimi
- i used to believe that if i swallowed beens,,a tree would grow in my stomach :P— fatma
- i used to believe that if you swallowed gum, when you breathed in, your stomach would stick to your back— cope
- I thought that if I swallowed grapestones, a tree would grow out from my stomach. — Tone