I used to believe that people got buck teeth when they talked a lot. My mother had a friend who talked a lot and her teeth stuck out, so I put two and two together. Made sense to me.
A childhood belief about general

others believed things like this
- When I was very young, I assumed that false teeth were taken from dead people's teethAnon
- I used to believe that eating burnt toast would make your teeth whiter and would brush your teeth for you.— Natasha
- I used to believe that if I didn't brush my teeth at night, ants would crawl into my mouth and eat my teeth.Anon
- Until I was about 8 I believed that your back teeth keep growing in until you have a full circle of teeth.Anon
- Until I was around 8 or 9 years old, I thought dentists took your teeth out and replaced them with new teeth.— Verapamilo
- My mother told me that the tooth fairy would only come if I brushed my teeth.— Dale