I have second degree burn scars on my arm from pulling a hot cup of tea down on myself when I was a toddler. I don't remember actually doing this (thank goodness), so they were something of a mystery to me when I was little.
Somehow I got it into my head that I was burned by lava. I had a whole scenario worked out in my head with my family and I jumping from island to island in a river of lava when some of it splashed up and burned me.
Now, I also had a lot of problems with my ears when I was little (as most kids do), so one day my doctor was flushing out my ears and had to use a pair of tweezers to get a piece of hardened red-ish wax from my ear. Belief confirmed! Obviously this was a bit of lava that had splashed into my ear at the same time I burned my arm.
A childhood belief about skin

others believed things like this
- I used to think Tomato soup was Lava.— Daniel Green
- i used to believe lava and water made electricityAnon
- I used to believe that when a person was "fired" from their job, that they were literally burned at the stake.Anon
- I thought firefighters were really "firefires," and burned houses down insted of putting them out.Anon
- Burned fish fingers ment the fish was from the black sea.Anon
- I used to believe that if i splashed water on the wall during a bath, the water would turn into spiders— justin