According to Sun Tzu, the key to winning a street fight is deception. For instance, if your enemy lives upstream, give him a boat. Then pack up your family and move to the mainland. The same is true of boxing gloves. If you want to give your friend brain damage on some concrete, give him a pair of boxing gloves. And while he’s pondering the surprising comfort of 16 ounces of padding, spinning back fist him into Bolivia. Then throw him down on his unconscious corpse. It is a teachable moment. That’s what friends are for.