When I was very young, my mom got her ears pierced. I asked her how they did it, and she said that they used a little gun to put the earring in. For years afterwards (until I was a teenager, probably) I was mortified of ever having to pierce my own ears, because I envisioned my mom standing against a wall, and someone with an actual gun on the other side of the room taking aim and firing at her ear.
A childhood belief about appearance

others believed things like this
- For some reason until I was about 10 I used to believe that the dentist pierced your ears.— Kendall.XxX
- I used to believe that "Earwigs lived in your ears", scared
me to death for years.— Will Chapman - i used to believe that bunny's could fly with their ears.Anon
- I used to believe that if you smoked too much,when you got mad your ears would smoke.Anon
- I used to believe that earwigs crawl in your ears— Janice
- My sister used to believe if you stuck a Q-Tip in one of her ears her brain would pop out the other ear. — Mr.McMelon