Now why is this? It seems counter-intuitive, after all, rhythm is rhythm whether you are following it with your legs or with your fingers, right? But it seems not. If anyone has any thoughts on this, I would be interested to hear them. I would speculate that the way dancers feel and execute rhythms in their bodies is quite different from the way musicians do. I can't quite put my finger on it... Is it that they are moving weight in space while we are placing moments in time? I really have no idea. But it is an interesting mystery.
And musicians seem to be notoriously bad dancers!