When I was little my mom told my brother and I that when you lie your tongue turns black. Whenever she thought we weren't telling the truth she would make us open our mouths so she could "inspect" our tongues. It was so smart because we would always confess before she even got the chance to look in our mouths. I think I was 10 before I finally realized my mom made it up. The woman is a genius because I never lied, and still don't to this day.
A childhood belief about general

others believed things like this
- I used to believe that monkeys were related to fish as they both have mouths!— Quako
- i used to believe that babies had no mouths because they couldnt talkAnon
- We put food in our mouths, so naturally I believed my stomach was in my head.— Timb
- when i was younger i thought ants had tongues. i always pictured them sticking their tongues out at me. — i was an idiot
- I used to believe that boys couldn't be teachers because they weren't smart enough. — Azz
- My sister just recently realized that the lyric "more than a woman" wasn't 4 letter woman!— Anne