Because of all those fat Buddha images (which, by the way, don't depict the actual Buddha), I used to believe that Buddhism was all about gaining weight. Ironically, I've ended up becoming a Buddhist myself - and I'm still skinny!
A childhood belief about characters

others believed things like this
- I used to believe that my cat was a reincarnation of the buddha and was sent by satan to squash me.— Nazza
- I used to suck on the ends of batteries intent on gaining super electric powers. Anon
- Ironically my parents were born on the same day; so growing up, I thought all parents had the same birthdays. Anon
- I thought it was impossible for anyone to lift more than their own body weight. Just seemed to make sense..— Xenomorph
- I used to believe that the "booger man" was a tall skinny guy that was covered in boogersAnon
- My mother, the good Catholic, thought that Jesus, being a string bean (supreme being) was really skinny.— Mark D