I used to believe that I had a twin who was imprisoned in my mirror, because she was bad.
I used to fight with her (er..me) all the time; I thought she was mocking me.
A childhood belief about mirrors

others believed things like this
- I used to believe that my reflection in the mirror was my evil twin that always had bad hair. XDAnon
- I used to believe that every person in the world had a twin, and that I had a long-lost twin in France.— Ashley
- when i was young i used to believe that my image on a mirror would come to life if i broke the mirror.Anon
- When I was little I was conviced if you said twinkee in a mirror 3 time a foot would appear. Anon
- I had a fear of seeing a person in the corner of the mirror(most of the time a morlock)— Shane
- i used to believe that everyone had a twin on the other side of the world.— tahnee