Taking Sex Differences Seriously by Steven E. Rhoads

Written in 2004.
There’s one problem with this beguiling vision of androgyny: whatever we might like to believe, as Dr. Steven Rhoads shows, sex distinctions remain a deeply rooted part of human nature. In Taking Sex Differences Seriously, Rhoads assembles scientific evidence demonstrating that these differences are “hardwired” into our biology. They range from the subtle (men get a chemical high from winning, while women get one from nursing) to the profound (women with high testosterone levels are more promiscuous, more competitive and more conflicted about having children than those with average levels.