Many guys see relationships with women as a zero-sum game: If she wins, he loses. Marriage is the ultimate contest: Her job is to get him to capitulate to marriage. So many men see marriage as the "end of freedom," the end of boyhood. That's why bachelor parties are supposed to revel in that boyish irresponsibility "one last time." So many guys figure, "Why rush into something that means basically that you'll be a prisoner forever?"

I believe that Americans are entitled. We're entitled to have a job that makes us feel like we have some dignity in our lives, that we live a life of integrity, and that we have good family relationships and our relationships with our friends and our families and our coworkers are enriching and meaningful.

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

It's like what you might call Goldilocks' dilemma in the old fairy tale. Young men see women as "less than" or "better than," but never their equals. And studies indicate that equality is the best foundation for a healthy relationship.

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.

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.

The pull of Guyland reminds us that women cannot accomplish this transformation alone. In the book's final chapter I argue that just as men need to stand up, do the right thing and break the silence that perpetuates Guyland, so, too, do women need to support each other in resisting its pull.