The makeup of the human animal is so fascinating – we're so smart, so inventive, and yet we are driven by powers over which we seem to have little or no control. The source of religion, I guess. I think the Hindus had it right: the sources of our impulses and instincts are "energies" that emanate from different parts of our bodies, which are like single-minded little gods and goddesses that want (need?) to be worshipped.
I think advertisers have figured this one out.