As a child, I asked my older sister about the little bumps (saliva glands) on the inside of my cheeks, about half way back.
She said that they were growths that had to be cut out, and grabbed some scissors to perform the operation.
I sincerely believed she would carry through with it, but wouldn't tell my parents because I thought they would make me go to the doctor.
A childhood belief about general

others believed things like this
- I used to think cut and paste meant there were scissors and glue inside the computer!Anon
- My older brother told me that speed bumps were really dead people covered in cement.— Trina
- I used to believe that if you died you could have 'an operation' to bring you back to life. — Mikey
- My little sister used to believe that a mullet was the "hair transplant" operation that balding men get.— Sarah's Sister
- When I was younger I asked my parents:
"If bees make honey, do flys make marmalade?"— Mike - First I believed that my parents were brother and sister. Then I thought that my dad was also my mums dad. — Rainbow