I suppose it depends on which type of soap you use whether or not it would be prudent to permit its residue to enter the ground water/near by stream, etc. That said, I've more than once fantasized about a morning shave on the banks of a creek where from I will soon extract breakfast. There is a magic in the sunrise as the light awakes the day. Surely a straight shave, as enjoyable as it can be, would only be enhanced with such a setting!

Peace,
Jim