When I was kid and my parents told me that Santa Claus wasn't real, well they must have put it something like "we were the ones doing all of that not Santa" so I just assumed that all adults did stuff like that and instead of realised that my parents were also the tooth fairy and the easter bunny, I decided that some other adult was doing those things and so I immediatly "figured out" that my dad's friend "Barry" was the tooth fairy. I proceeded to make a fool of myself by making a huge deal in front of him everytime I lost a tooth.
A childhood belief about fairies

others believed things like this
- 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
- 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
- i used to believe that if my tooth came out the tooth fairy would come and kill me!!!— dangerous tooth fairy
- i used to believe that the tooth fairy was a big tooth with wings— mary