My flat mate told me this one:
When he was 8/9 yrs old, people at school started to learn about sex and rude words. One boy had overheard the word frigid but somehow managed to mishear it and misunderstand it.
A story then went around school that people who had never kissed anyone were called "fridges". Some smart kid deduced that people who had kissed someone must then be called freezers!!
A childhood belief about sex

others believed things like this
- That when people kissed at a wedding that's when the women got pregnant— Conner
- I used to believe that people from Holland were called "Hollish", like people from Poland are called "Polish"— Sally
- When I was a kid I thought babies where made when people hold hands and kissed nude...— Ryan
- When I was younger I thought French Kissin gwas when to french people kissed.......Hah....Stupid huh??? — ~Duckie~
- I used to believe that tv people were tiny famous people that lived inside that box with a window called TV.— Miguel Horacio
- When I was a kid, I believed that bible school was "beauty school", and called it that all the time.— Dana