I used to believe that my parents weren't my real parents, but were instead imposters wearing masks. Therefore, every once in a while I would try and catch them out pulling at their noses to try and remove the masks. They initially found this behaviour cute, but after a while my dad got really annoyed about it and would yell at me whenever I did it.... thus re-enforcing my belief.
A childhood belief about family

others believed things like this
- When I was a child I used to believe that doctors wore those face masks incase they threw up.— Nicole
- I used to believe Dragons were real like Dinosaurs. I found out the other day they weren't.. Haha. Anon
- Ironically my parents were born on the same day; so growing up, I thought all parents had the same birthdays. Anon
- I used to think that if you met your parents' boss, your parents would be fired!! AAAAAHHHHHHH!!!— Spoot
- I used to believe that we can change our parents and pay them to be our parents— yzoy
- Split walnuts... i used to think they were dried pig noses!!— SaMmI LaMy