I know you cuss, there's competition (In motorcross, there's competition)

The story:

My best friend and I were both ardent Styx fans and would play their records often. When this song played, he made a comment about what a strange lyric it was: "In motorcross, there's competition." I laughed and said, "No, it's 'I know you cuss, there's competition'!"

We argued about who was wrong or right, each sure he had the correct lyric. It wasn't until years later I learned we both had it wrong!