When I first heard the phrase "survival of the fittest," (probably around age 7 or 8) I had no idea what the word "fittest" meant and believed that people really meant "fattest"! ^_^
A childhood belief about speaking

others believed things like this
- For years I heard the word "pedophile" and thought it meant a pedicurist's tool.— Lauren
- my husband believed, until recently, that the word "several" meant seven of something. — sheryl
- I thought the phrase "At one's disposal" meant you should dispose of the person or thing.— Geirskogul
- I fully believed, up until about 6 years old, that the word 'accident' was a noun that meant 'burnt toast'.— Karl Goetz
- i used to believe that sex meant love and that having sex meant the two people would live happily ever after.— amy
- I used to think being engaged meant being in jail. I have no idea how I came to that conclusion.— CNB