Until recently (I'm 17) I thought the song by The Who, "Happy Jack" was about an unpopular Australian politician who managed to usurp and abuse most of the country's power. Because the people hated him, they tied stones to the ends of rope, slung the rope over him and drowned him. I believed the line "They couldn't stop Jack or the water's lapping/ and they couldn't prevent Jack from feeling happy" referred to the water lapping over his head as he drowned with a smile on his face because of all the immoral things he'd done. The best part is I didn't even realize I believed this until I listened to the song this year and memories of my odd little story came back!
A childhood belief about songs

others believed things like this
- When I was a year old, I believed if I hid my face, my mother couldn't see me because I couldn't see her.— kimberly dianne(:
- I thought Jack was a nickname for Jackery ( like Zack and Zachary).— Bootlebat
- "She's got the Jack" by ACDC was "She's got the Clap".— Cybela
- I used to believe that tornadoes were spinning jack-o-lanterns in the air bent on destroying my house.Anon
- Since the girls name Jackie is short for Jacqueline, I thought the boys name Jack was short for JackalAnon
- I used to belive that Jack Frost was a real man! and that he came and painted frost on the windows at night.— Tom