When I lost my first tooth, I was sure it was because of what my mother used to say -- if we didn't take good care of our teeth, they'd fall out.
It took some convincing from my brother before I told anyone else and would let the Tooth Fairy come get it.
A childhood belief about fairies

others believed things like this
- My mother told me that the tooth fairy would only come if I brushed my teeth.— Dale
- I used to think that the tooth fairy puts you in a deep sleep before stealing your tooth/teeth.Anon
- I used to believe that in the tooth fairy took all your teeth and built a tooth city for her to live in!Anon
- I used to believe the the tooth fairy was a Pokemon fan because she got me Pokemon Crystal for my lost tooth— Pokemon fan
- As a child I was taught that the tooth fairy would buy our teeth so she could add them to her crown.— Lola
- when i was a child i used to believe if i put my tooth under the bed the tooth fairy would give me money— milena