So does a potato peeler.
(
JollyJack - a stench from the past,
Thu 15 Sep 2011, 17:22,
archived)
but that hurts
and leaves lots of blood, which has DNA in it. you can still be traced.
(
Smash Monkey lowering the tone of the whole internet,
Thu 15 Sep 2011, 17:24,
archived)