Masculine stereotypes control the behavior of men in organizations. Those of higher positions may not fraternize with those on lower levels. Senior personnel are expected to dress accordingly, be in control of one's emotions—though showing temper is not necessarily frowned upon, in general (I believe). Men will joke with other men at their level, but not with junior employees, and perhaps women as well. Men are expected to be strong leaders, and never show a soft side.
These are, of course, generalizations. There are many companies that consider these behaviors somewhat archaic. Fridays are dress-down days. Holidays find office members celebrating on equal footing, and kindness to one's employees is seen as a desireable and commendable attitude. This promotes a more positive work environment, and motivates people to work together and help each other.
The stereotypes keep people compartmentalized, guaranteeing that "classes" do not intermingle...much the same way the aristocracy in Europe at one time would not mingle with peasants or the emerging middle-class, post Middle Ages. These stereotypes provide a strong sense of leadership, where actions are not likely questioned. Stereotypes constrain: while leadership is important and setting examples is important, a lack of interaction between all levels of personnel can promote jealousy, competition and distrust.