I was about four when the Beatles released "Can't Buy Me Love." It was the first rock 'n roll song I remember hearing.
I thought the lyrics leading up to the chorus were "I don't care to bump the money, money can't buy me love."
I had no idea what bumping the money meant.
A childhood belief about misheard lyrics

others believed things like this
- When I was a little kid I used to believe that tissue paper was money and that you could have a box of money.Anon
- I used to belive that if you went up to an ATM it would just give you money out that is not your own money.Anon
- I used to believe that the B-52's song "Love Shack" was actually "Love Shark!"— Natalie
- I used to believe that the lyrics to Bon Jovi's "You Give Love a Bad Name" were "You give love a Band-Aid".Anon
- I used to think the song "love the one you're with" was called "love the one, your win. — Glowworm
- I thought that the song "Built this City" by starship went as follows. "Milk and Cereal, Rock and Roll"Anon