The average man will shave approximately 20,000 times over the course of his life, spending the equivalent of 139 full days doing it. He will shave off 27 feet of hair, from a total of 30,000 whiskers on his face. And he will probably be doing something wrong. So he'll suffer nicks and cuts, ingrown hairs, and rashes; his five-o'clock shadow will arrive before lunch, his neck will be irritated and red, and he'll get razor burn. Instead of reaping...