I used to believe that everyone died once they reach 100. The image being, Granny opens her "Happy 100th" birthday card just before dropping down dead!
A childhood belief about people

others believed things like this
- I used to believe that everyone lived until they were 100 and you dropped dead on your 100th birthday!— Natalie
- When I was little, I used to believe that everyone died on their 100th birthday.— Kristen
- I usd to believe that, all Americans were left handed and we all died when we reached our 100th birthday!— Greg Baron
- I used to think raisons were bits of old people and after my granny died I never at them again— rraisonhaterrt
- i used to believe when someone died their image on photo's would disappear— beryl's girl
- I thought a Debit card was actually called a Debt card.— Kilgore