When I was little, my parents told me "the only people who aren't strangers are Mommy and Daddy." I took this to mean that everyone in the world was a stranger to everyone else, except my parents, who weren't strangers to anybody.
In kindergarten I tried to convince my friend that I didn't REALLY know her, because I didn't know her middle name, etc., and because my parents said everyone was a stranger but them.
A childhood belief about family

others believed things like this
- I used to believe that a stranger was a man with an X on his coat— Gabe
- Migets were people who were bad when they were kids and there parents didn't let them grow up.— Teresa
- Strangers in the night, exchanging glasses...
well I was only young at the time!— ..maz.. - I used to believe that the boogie man would come and get me if I didn't listen to my parents.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