I used to believe that sex was only for reproduction, and that condoms were a way to prevent AIDS without preventing conception. A filter would let the sperm through, but not the virus.
I found a box of condoms in a bag my parents had brought home from the drug store. I confronted Mom about it, demanding to know which one of them had AIDS and why they wanted a new baby anyway.
She told me the condoms were a joke gift for their friends and didn't correct any of my confusion.
A childhood belief about condoms

others believed things like this
- i used to believe that condoms were thing that u put in your mouth and they would melt and kill all the spermAnon
- When i was a nipper my mum told me that condoms were sweeties for grown ups - i believed it for years!! :-)— LCF
- i used to think that condoms were gum and i tried to buy one once when i was about 8! — silly
- i used to think condoms were for your ears!— Hanky
- i used to belive that condoms where chewing gum— condom chewer
- i used to believe that condoms stopped a mans wee getting out while having sex.— a boy