I used to believe that 82 was the highest possible age for people, that if you hadn't already died, you would surely die when you were 82. This is because my great grandmother died at 82. I never concidered the fact that I had another great grandmother, still alive at 96.
I also believed that my grandfather died (at 59, when I was three) because he ate too much chopped liver.
A childhood belief about people

others believed things like this
- My great grandmother died when I was 9. I didn't go to the funeral because I thought she'd be a skeleton. — Angela
- When I was little I believed when an actor died in a movie, he died in real life.— Ben
- I thought there was some video games so hard that if you died on them you also died in real life!— Kakuri
- My great-grandfather firmly believed, and had me convinced, that SPAM was mouse meat. — texasblue
- I used to believe that when we died (and animals) died they were picked up in a bus with there name on it.— Lawny
- When my favorite Uncle died, I thought if I stared at him in his coffin he would open his eyes and be alive.— Cindy