When I was a little kid, I would never eat the wrinkled ends of a hotdog because I thought they were poisonous. I suppose it was just because they're sort of ugly looking...?
Anyway, grew out of that one.
A childhood belief about dangerous food

others believed things like this
- I used to think it was true that only ugly girls poop and I thought I was an ugly girl because I poopedAnon
- Whenever my fingers wrinkled from staying in the pool too long, I thought I was aging faster.— The Mortal Elf
- I used to believe if you stayed in water too long your skin would get really wrinkled and stay that way.Anon
- We had an antique lamp that I thought was hideous and for years I thought "Art Deco" was a synonym for ugly.Anon
- When I was little I USED to THINK that hair grows by the ends.— Sirin
- I used to believe that sky ends at the horizon and by crossing it we can go to another world..— Debasish Satapathy