When I was little I thought that EVERYBODY's mom took their temperature in their tush. It was only when I started watching TV - the Brady Bunch and the like -- did I realize that some people got their temperature taken in their mouth.
A childhood belief about being ill

others believed things like this
- I used to believe that if you turned the thermastat temperature above 70 degrees that everything would melt.Anon
- I used to believe that Metal music was when a bunch of people would bang metal together to make noise. Ha ha.— Kassandra
- I used to think people had a "potty mouth" if they had been drinking out of the toilet.Anon
- when i was about 5 or 6 i thought sombody was watching me on t.v like i was watching them. — leigha
- I used to believe that the credits at the end of a movie was a list of people in that were watching it.— jon_
- Atomatic toilets had people inside of them watching to see when you are done.Anon