My mom loved Fleetwood Mac when I was little, and I could never understand why she would like a group who sang a song about "parents only love you when they're playing". It was only when I was about 15 that I realized they were saying "Players only love you when they're playing". I used to ask her all the time if she REALLY loved me.
A childhood belief about misheard lyrics

others believed things like this
- I used to believe that the B-52's song "Love Shack" was actually "Love Shark!"— Natalie
- I used to think the song "love the one you're with" was called "love the one, your win. — Glowworm
- My dad told me that playing basketball makes you taller. Basketball players are tall, so I believed him.Anon
- When I was a kid I loved to eat onion rings, until I realized that they were made with onions.— Beth Pärssinen
- My buddy used to think that when Steve Millers sang "Jungle Love" he was actually saying "Chug-a-lug" — Harold
- I always hear Manic Street Preachers 'You Love Us' as 'You Love Arse'.— Lou