cut paper / wood
There are two things that amaze me about the human brain. The first is that the one thing which is solely responsible for our continued survival and evolution as a species is a soft, squishy, pink-grey blob of squiggles. As opposed to, say, sharp fangs or claws (possibly poisonous) or chunky armored skin. All of which seem, on first glance much more useful for self-defense. Not to mention cool.
The second is that, as a society and culture, we are constantly putting down the brain and those people who use it. We call them geeks and nerds, and push them to the outskirts of our social circles. We admire people who seem to go through life without even once showing they have that pink blob; put them on TV and elect them to office. I for one consider myself a friend of the brain. Mine’s done alot for me over the years (though not always at the time and in the way I had planned). That’s why I treat mine well; feed it fish, try not to smack it around too much, and send it on vacation whenever possible.