I used to believe that if you swallowed chewing gum, that it could not be digested, instead, the body deposited the wad of gum into the appendix. Once the appendix became too full of gum, then that person would have to have his appendix removed. I always spit my gum out as a kid, and now I don't even chew gum anymore.
A childhood belief about chewing gum

others believed things like this
- i used to believe that when you had cramps your appendix would blow up.— Avery
- I thought i had to chew my food 27 times before i could swallow because Stephanie said it on Full HouseAnon
- When i was a kid i believed that you died if you swallowed chewing gum.— Jonathan
- I used to belive that, if you swallowed your chewing gum, you'd fart bubbles...— Heidi, Pittsburgh, PA
- when I was seven my brother told me that if I swallowed chewing gum my arm would drop off.— john
- I used to believe that if I swallowed chewing gum, it would wrap around my heart and strangle me— "Tusitala"