I used to always associate the world "double" with cheeseburgers because of double cheeseburgers from McDonald's.
A childhood belief about general

others believed things like this
- Some sport cars have a double exhaust. I wondered why. Why would people want to pollute twice as much?— F*ck the environment?
- I used to believe that the solid double yellow lines on highways were the motorcycle lane.— jeech
- I believed that the gap between the double yellow lines in the road was a special lane for motorcycles.— Joel
- I long believed that Ronald Reagan was Ronald McDonald's brother. And I thought it made him more impressive!— JB
- i used to associate the word appetite with apples, if you ate apples, you had an appetite. — elly
- I thought the world was black and white because of all the smoke from the bombs in Second World War.— Bjoern