I dont know what i believed about mirrors but i was scared that if i looked in them too long or in near dark then my reflection would do something that i hadnt done. Like.. my reflection wasnt really me. (probably all because of the movie poltergeist 3 which was out when i was a kid. that kind of mirror stuff happens in it)
A childhood belief about mirrors

others believed things like this
- one of my friend's was told by his father that if you didn't turn mirrors over the reflection would run out.— pri
- i always thought I was the reflection and your reflection was a personAnon
- I used to believe that when you cracked a mirror your reflection would come and take over your body!— XxXAbbeyXxX
- I used to believe that my reflection in the mirror was my evil twin that always had bad hair. XDAnon
- If you stare into a mirror in almost complete darkness, the devil will appear instead of your reflection.Anon
- I believed that if I looked too long in the mirror admiring myself the Devil would appear.— Paul Elletson