So the other day I decided to sharpen our kitchen knives. To test how sharp they are I always try and cut a few hairs off my arm with them, but, since my legs were so hairy I just shaved my legs instead! Yep, the knives are nice and sharp now and my legs are smooth!
Don't try this at home, but if you do, you have to get the angle right and you just slide the knife along (like a razor) DON'T whatever you do saw back and forth with it!!!