Yeah, all jokes aside, I'm agreeing with Grey Wolf. Specifically, there are certain diseases where the blood vessels in the skin contract, and if the body (especially the extremeties) aren't kept warm, severe frostbite and even gangrene can set in.
My mother has scleroderma, and she has to bundle up really tightly when it's cold. Something like this would help keep her body temperature warm, like a portable electric blanket. The medical uses far outweigh the entertainment value.
But hey, all new technological innovations come from the porn industry, right?
