In fifth grade, I had seen a condom in its packaging, where it just looks like a ring. For quite a while, I thought a condom just fit on the base of the penis (like a ring on your finger) and somehow shot invisible rays that kept any sperm from coming out. It wasn't until I bought one and opened it that I realized the non-scifi truth.
A childhood belief about condoms

others believed things like this
- When I was little I thought a condom was short for condominiam Anon
- When I was about 6 years old, I thought "condom" was short for "condominium!"— Confused Child
- For some reason i used to think that condom was another name for your boobs! — Claire
- I used to think sperm was invisible.Anon
- 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