Guys constantly talk about pornography in two ways: as revenge and as reassurance. When you live in a world in which beautiful, sexy women are all around you, in the same classes, on the same athletic field, competing for the same jobs, then the pornographic world - the world in which women thrill to male sexual desire - reassures men that although they may feel "one down," they're still entitled to women's bodies.

Many boyfriends or close male friends seem so different when they are by themselves, as opposed to when they are with a bunch of other guys. I think it has to do with the desperate desire on the part of guys to be seen as a "real guy" - a real man, a man's man.

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.

White men in Europe and the US are the beneficiaries of the single greatest affirmative action program in the history of the world; it is called the history of the world.

And few hookups, if any, ever take place sober. And while wearing "beer goggles" may make people appear more attractive, it doesn't exactly make for sexual ecstasy! There's always been a difference between pleasure and scoring.

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.

Playing along with Guyland may be the only way an individual woman might believe she has a chance at a social life or a relationship. Sometimes it gets pretty crazy, like a sorority requiring that all the pledges sleep with the members of the "brother" fraternity.