I thought till I was about 13 that condoms were like plastic cylinders that were supposed to be put on the penis.
A childhood belief about condoms

others believed things like this
- I used to believe that condoms were weared by girls and boys
both. And they both have penisAnon - I used to think that doctors added plastic to your face in plastic surgery.— caro
- I used to think that plastic surgery actually involved using plastic.
— JohnJ - I used to believe that plastic surgery was done with plastic knives.— Vicki J.
- I used to think that Frankie Avalon sang, "Hey Penis, Oh, penis..." instead of "Hey Venus."Anon
- When my brother would go by condoms i thought that guys had period and that is what they usedAnon