When I was 5, sitting outside a hotel in a rented convertible, I saw a very fat man walk by. Much to my dad's embarrasment and to the fat man's amusment I quipped "Boy, if he was skinny he sure would be tall, huh dad?"
Apparently I thought people did not loose weight, they just rearranged it.
A childhood belief about appearance

others believed things like this
- That everyone had the same amount of skin and that short people were fat and tall people were skinny.Anon
- I used to believe that the "booger man" was a tall skinny guy that was covered in boogersAnon
- i used to think water towers were houses for really tall people. I thought they had big heads to.— Alyssa
- I saw this guy at a hotel and he wore a tag that said "trainee," so I thought that it was his name!Anon
- I thought it was impossible for anyone to lift more than their own body weight. Just seemed to make sense..— Xenomorph
- I once thought a vent in my hotel room led down to the center of the earth.— flarn2006