I had a teenage cousin that I thought was the coolest guy in the world. He had a poster on the back of his door showing a woman in a nurses uniform holding an unrolled condom (I think it was an ad poster to convince people to use condoms).
Anyway, my mother is a nurse and I immediately thought that to use a condom it had to be put on you by a nurse!
A childhood belief about condoms

others believed things like this
- I believed that everytime I kissed my David Cassidy poster he'd feel it back home in Hollywood.— Marie M
- i thought that since my dr's name was "Dr. Washer" that meant my nurse's name was "Dryer" ... i know, its sad— mekare
- 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
- When we were young, the adults said that the rudest possible word was 'District Nurse'. And we believed them— Steve Haughton
- For some reason i used to think that condom was another name for your boobs! — Claire