That dominant conception of masculinity in U.S. culture is easily summarized: Men are assumed to be naturally competitive and aggressive, and being a real man is therefore marked by the struggle for control, conquest and domination. A man looks at the world, sees what he wants and takes it. Men who don't measure up are wimps, sissies, fags, girls. The worst insult one man can hurl at another -- whether it's boys on the playground or CEOs in the boardroom -- is the accusation that a man is like a woman. Although the culture acknowledges that men can in some situations have traits traditionally associated with women (caring, compassion, tenderness), in the end it is men's strength-expressed-as-toughness that defines us and must trump any female-like softness. Those aspects of masculinity must prevail for a man to be a "real man."
That's not to suggest, of course, that every man adopts that view of masculinity. But it is endorsed in key institutions and activities -- most notably in business, the military and athletics -- and is reinforced through the mass media. It is particularly expressed in the way men -- straight and gay alike -- talk about sexuality and act sexually. And our culture's male heroes reflect those characteristics: They most often are men who take charge rather than seek consensus, seize power rather than look for ways to share it and are willing to be violent to achieve their goals.
That view of masculinity is dangerous for women. It leads men to seek to control "their" women and define their own pleasure in that control, which leads to epidemic levels of rape and battery. But this view of masculinity is toxic for men as well.
If masculinity is defined as conquest, it means that men will always struggle with each other for dominance. In a system premised on hierarchy and power, there can be only one king of the hill. Every other man must in some way be subordinated to the king, and the king has to always be nervous about who is coming up that hill to get him. A friend who once worked on Wall Street -- one of the preeminent sites of masculine competition -- described coming to work as like walking into a knife fight when all the good spots along the wall were taken. Masculinity like this is life lived as endless competition and threat.
http://www.trinicenter.com/modules.php?name=News&file=article&sid=1491