I used to believe that the line "Wo-oo we're half way there" in "Living on a prayer" by Bon Jovi was "Oh-oh half-laid egg", and every time the words "make it" were used, that they were "naked", for instance "It doesn't make a difference if we're naked or not", and "Take my hand, we're naked I swear!". Even now, I cannot hear the song without indefinitely hearing "Half-laid egg.", It just seems to sound closer to that than "Half way there."!
A childhood belief about misheard lyrics

others believed things like this
- I used to believe that your belly button was what held your top half to your bottom half...— Debelouwho
- i used to think that if i tore a dollar bill in half it would make fifty cents— stacy
- I used to believe jaywalking meant walking around naked in public (from naked as a JAY bird...)— Izzi
- An hour and a half is exactly the same as half an hourAnon
- I used to think you could die if you jumped half way down the stairs. Anon
- i used to believe that if there were bombings, that the world will split in half.. — kins