Are you wondering why the first person shaved? I don't know. Are you wondering why we shave now? Now we shave because it is socially acceptable and encouraged, we shave because we're told that to shave is more attractive, and because our culture tells us that if we'll ever have a significant other (which is, of course, of the utmost importance) we must work our hardest to be attractive. We shave because if our beards are patchy in spots we are shamed and told not to grow any facial hair at all. We shave because it is more comfortable to have all that hair gone (sometimes). And so on.