“In fact, the very thing that many high-reactives hate most about blushing—its uncontrollability—is what makes it so socially useful. “Because it is impossible to control the blush intentionally,” Dijk speculates, blushing is an authentic sign of embarrassment. And embarrassment, according to Keltner, is a moral emotion. It shows humility, modesty, and a desire to avoid aggression and make peace. It’s not about isolating the person who feels ashamed (which is how it sometimes feels to easy blushers), but about bringing people together.”