In the old days, it was so simple: Men hunted and women raised the kids. Then we moved out of caves, invented gender studies, and learned a bit about genetics. Now nothing is clear-cut.
While the social and biological sciences of gender have offended some, they have freed others to finally feel comfortable in their own skins. Whether you're gay, gender-bending, transsexual, or just curious about why men and women treat each other the way they do, there's something in here for you.