I used to believe a thong was a female condom that you slipped up your leg.
A childhood belief about condoms

others believed things like this
- I used to believe in the Cysco song "Let me see your thong" he said let me see your thumb.— Anymous
- I used to think that to desex an animal meant to turn it from a male to a female or female to male.— Phil
- For some reason i used to think that condom was another name for your boobs! — Claire
- Until I was about 10 years old, I used to believe that a condom was a type of lollipop!— Marcel
- Used to believe that a condom was a little fold-up bag that you feed to your dog so it poop in a bag.— Anais Daehao
- When I was little I thought a condom was short for condominiam Anon