I used to believe if you and an other person stepped with the same leg at the same that both of you were related. Apparantly I had a lot of relatives!
A childhood belief about family

others believed things like this
- I used to believe that all my aunts were related to my mother and all my uncles were related to my father.— Mandy
- After being told by my parents or relatives to "behave," I would usually reply: "I am being have."— Ed
- I used to think you could drive to heaven to visit your friends and relatives who had died before....— wombat
- I used to believe that people with the same first name were related.— Rebecca
- I used to think that all people with the same FIRST name were related.— Lisa
- I used to believe that if you stepped on a mushroom it would rain. Anon