There are two kinds of songs in the world -- good and bad. There are two kinds of good songs in the world -- naughty and nice.
I had a friend, an accomplished musician, who was invited to sit in with the Gipsy Kings one time. He found the experience crushing -- sweat poured down his face as he struggled to keep up, while the Gipsy Kings just looked rather distracted and bored. Maybe wondering whether they could catch an earlier flight that evening, or if they stayed, what about dinner -- French or Spanish.