I used to believe that the lyrics to Bon Jovi's "You Give Love a Bad Name" were "You give love a Band-Aid".
A childhood belief about misheard lyrics

others believed things like this
- I always hear Manic Street Preachers 'You Love Us' as 'You Love Arse'.— Lou
- I used to believe that the B-52's song "Love Shack" was actually "Love Shark!"— Natalie
- I thought Maria Carey's 1998 ballad was 'I'd give my arms' instead of 'I'd give my all'.— Briony Maggs
- I used to think the song "love the one you're with" was called "love the one, your win. — Glowworm
- I am Canadian and when I was little I would sing "True Pastry Love" instead of 'True Patriot Love"— Jess
- I thought that if you had sex with a man that didn't really love you, he would be able to pee in you— Lenny