I used to firmly believe that there was an opposite to everything. The opposite of a carrot was a pea, just as the opposite of a boy was a girl. I got quite annoyed when my dad, who, after all, was a scientist, wouldn't help me classify some of the ground rules to this world of mine.
A childhood belief about physics

others believed things like this
- I used to believe that if I could kiss my elbow that I would turn into a girl (the opposite sex).— Rusty
- I used to believe that the opposite of “impressed” is “pressed.”Anon
- i used to believe that everyone was born as the opposite sex, and that you changed when you started school.— llama
- I thought ground beef was the meat they scraped off the ground at the slaughterhouse. Yuck.Anon
- As a little girl I used to think that the world was magical.Anon
- My friend's sister believed the lyrics to Gazza's "Fog on the Tyne" were "Fog on the dinasaurs mine all mine"— Suzanne