I have a reddish birthmark on my left arm right at the crease of my elbow, about an inch in diameter. My mom told me when I was young that it was a scar, from when my uncle was holding me as a baby and smoking at the same time, and ashes from his cigarette fell on my arm and burned me. After a few years, my father was finally able to convince me that it was really just a birthmark, and that my mom was being silly.
Except she really -does- believe it is a burn mark, despite the fact that a burn that bad as a baby I would have had to have gone to the hospital for...
A childhood belief about appearance

others believed things like this
- I used the scar on my dads leg was a shark bite when in fact he fell off his bike when he was a child— Wendy Murray
- When I was young I had a plan to shoot big piles of paper up to the sun so it would never burn out.— Waterbottle
- Untill I was about 15 I thought that the birthmark on Mikael Gorbachov's head was actually a map of the world.— Rob , Solihull
- i used to think if i would eat spicy food i would burn and die— Bill
- I used to be terrified of fire-flys because I believed they would burn if they landed on me.— kevin
- i used to think tha if you went outside when it was acid raining the rain would burn holes in your skin— fear of rain