Taking it beyond the sexism angle, exclamation points are like the pumped up macho guy in a mafia movie, yelling and threatening with puffed up gestures and poses. But he has very limited power. The real authority lies with the withered 80 year old godfather; he doesn't even need to speak. An unchanging facial expression, a small, almost imperceptible upward head nod with a sideways glance and the henchmen know exactly who to put the hit on.