My Jewish friend has a mole on the exact middle of his knee, and so do his other family members. Since he and his family were the only Jewish people i knew, I thought that only Jewish people had moles in the middle of their knees while other nationalities had them on a different spot in the knee, since I was Norwegian-American and most of my friends were American/Mexican and didn't have moles in the middle of our knees.
A childhood belief about skin

others believed things like this
- Since Germans speak German, I thought Jewish people spoke Jewish.— Lori
- I grew up Jewish. Until I was about 10, I believed that everyone who wasn't Jewish was Catholic.— Philm35
- I used to think that jewish men wore "kippots" or "yarmulkes" to cover their bald spots..— Charlotte
- I used to think that your knee cap was called your knee ball.— Erika
- I thought that all black people were African-AmericanAnon
- i believed that moles wore davy lamps on their heads so they could see underground— Omi