This isn't mine, but my dad used to think that the lyrics to the Beach Boys song "Fun, Fun, Fun" were "We'll have fun, fun, fun 'til your daddy takes the teapot away." instead of "We'll have fun, fun, fun 'til your daddy takes the T-bird away."
A childhood belief about misheard lyrics

others believed things like this
- I used to believe that when sheep die, god takes their wool and makes it into clouds— Oded
- I used to believe that these big, strong men would be on each side of an airplane to push it when it takes offAnon
- My friend's sister believed the lyrics to Gazza's "Fog on the Tyne" were "Fog on the dinasaurs mine all mine"— Suzanne
- I used to believe that beer was called daddy juise
— jason - I used to believe that Mother Nature was The wife of God. She was the mommy and he was the daddy. — Dawn
- When I was a boy I flushed my fish down the toilet thinking that it would go to its mommy and daddy.— Jeremy Clark