I used to believe that my Mum was Mary and my Dad was Jesus (?) and I was born in a stable, then my parents changed to who they are now after I as born. I believed this happened to everyone.
A childhood belief about family

others believed things like this
- i used to believe that everyone was born as the opposite sex, and that you changed when you started school.— llama
- How could Baby Jesus be born on Dec 25th, get tall, grow a beard and then die, all by Easter. Whew!— Joe
- I used to believe that I was older than my brother because I was born in June and he was born in OctoberAnon
- i believe that if im born in december im older then people born in may— runawayfox16
- Ironically my parents were born on the same day; so growing up, I thought all parents had the same birthdays. Anon
- i believed that "birthmarks" were from poop stains from your mom when you were born.— Abberatia