Shimrod, if you get right down to it, everything comes from nature -- even the dreaded pesticide. Soap is a comparatively uncomplicated substance that has been with us for thousands of years -- the Babylonians made it, as did the Egyptians, the German tribes and the Celts. The Greeks and Romans preferred olive oil and the steam room, but that's mostly because they had olive oil and steam in abundance.

Humans are natural, too, you know.