A friend of mine got into an argument with this metalhead guy. The metalhead guy thought the expression "play it by ear" was actually "play it by air." Personally, I don't know where "ear" comes from, but "air" sounds even more stupid. He was 18 at the time.
A childhood belief about speaking

others believed things like this
- My friend told me she had invented the expression 'Gordon Bennett' and I believed her!— SueE
- My friend's sister believed the lyrics to Gazza's "Fog on the Tyne" were "Fog on the dinasaurs mine all mine"— Suzanne
- I thought god looked like the face on the play-doh can!— Jonathan Franz
- My parents used to have an old radio. I thought it could only play old songs, like from when they were young.— kathy
- I used to believe that my toys would wake up when I went to sleep, and would play by themselves.Anon
- I used to believe that you could only play a record once, and after that all the sound was wiped off.Anon