The following is according to my parents.
When I was in kidergarten, I came home from school one day and told my parents that one of my friends told me that if I ate a lot of crackers, I would never have to go to the dentist. They said, "No, everyone has to go to the dentist." Then I responded with, "Oh yeah? Well, he's in FIRST GRADE! He should know!"
A childhood belief about classes

others believed things like this
- I used to believe they were called dentist disappointments rather than dentist appointments.— Emma
- For some reason until I was about 10 I used to believe that the dentist pierced your ears.— Kendall.XxX
- When I was little, I thought the tooth fairy was a personal friend of my mom since she was a dentist.— Jess
- I used to believe my dentist could give me a shot to straighten my teeth and prevent cavities.— sircigar
- Until I tried it in 3rd grade, my parents told me that if I ate paper my poop would come out in packages.— The Mailman
- After being told by my parents or relatives to "behave," I would usually reply: "I am being have."— Ed