Thanks for the link, Gibb Sahib.

I think it's not the song that's important, but the dancing movement that goes with it. It probably takes the strain off the back.

I have arthritis in my spine, and I would find bending over like absolutely miserable. By doing it while dancing, they guys are probably making the job easier. It is similar to using a rocking chair, which is good for back backs because it constantly moves one's weight around.

Somebody ought to invent a tool which lets the job be done while in an erect and natural posture.