I have no idea why, but I used to believe that "The Little Drummer Boy," my favorite Christmas carol as a child, and "Do You Hear What I Hear?" were the same song. Except the former was the original and better version, while the latter was a crappy spinoff in which someone had decided to mess with the tune and add their own lyrics. Whenever I heard "Do You Hear What I Hear?" sung on the radio at Christmas, I felt angry at the artist for singing "The Little Drummer Boy" wrong and ruining it.
A childhood belief about songs

others believed things like this
- I used to believe that if you spoke into the speakers that they would hear it at the radio station. — natalie
- I was told that for every christmas carol i sang before christmas time santa would give me one less present!— K
- I used to believe that no one could hear me when I hummed — Grace
- When i was about 5 years old, i used to believe that everything i thought people could hear!Anon
- I used to belive that if I put my finges in my ears when i sang noone could hear me— Helen
- When I was younger, I used to believe if i covered my ears before I farted no one else would hear it.— Lime