So guys who are otherwise sensitive and thoughtful say and do ridiculously dumb things to impress other guys. It's an enormous performance, but guys know that if they fail, they'll be ridiculed as sissies mercilessly.

Ironically, survey after survey shows that married men are happier and healthier than unmarried men. Oh, and they also have more sex.

My colleagues and I have done a survey of 13,000 students on more than 17 campuses, and we found that while sex in college has always been a bit more casual, "hooking up" has pretty much replaced other traditional forms of dating.

I think there is another choice for women; it involves challenging Guyland and supporting each other.

We have the data to prove to men that gender equality is not a zero-sum game, but a win-win.

The privilege of privilege is that the terms of privilege are rendered invisible. It is a luxury not to have to think about race, or class, or gender. Only those marginalized by some category understand how powerful that category is when deployed against them.

Young men are eager to "hook up" with women. And many say they have very good female friends. But some of the emotions circulating among guys make it difficult to form and sustain healthy relationships.