I have always been (and still am!) convinced that the Beach Boys song 'I Was Made To Love Her' has the refrain 'Hey, hey, you son of a b***h!'. I am told that it actually says 'Hey, hey, yes I was made to love her' - but I don't believe it!
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
- I used to believe that the heart at the beginning of the I Love Lucy Show was made of real chocolate.— Krissa
- I always hear Manic Street Preachers 'You Love Us' as 'You Love Arse'.— Lou
- I am Canadian and when I was little I would sing "True Pastry Love" instead of 'True Patriot Love"— Jess
- In Beyonce's song 'Crazy in Love', I always thought she said 'Daisy right now'.Anon