The art of the handshake is a difficult one to perfect. Growing up, we're often taught that the best kind of handshake is one administered with a firm grip, accompanied by brief pump and a quick but direct dose of eye contact. Don't go limp like a fish, they say. But don't squeeze so hard your new acquaintance loses all feeling in their fingers, either. There are a lot of rules when meeting someone new, and in many ways, a handshake is an exercise ...