A Killer Impression

Why is it that in the movies, all the killers, hitmen, and assassins always were black boots. I don't know about you, but if I was running around shooting and killing people I would probably want something a little more comfortable, like a light tennis shoe or sneaker. Then again I guess I would kinda look silly wearing all black except for my white reebok pumps, and I can't go around killing anyone if I look silly... I mean it is true what they say, "You only have one chance to make a first impression"... especially if you kill them.