At this point I would recommend reading Great Sex Rescue and once you are done with that, then maybe you can find value in For Men/Women Only.
Takeaway: Women and men are different. Using interviews and surveys can show some differences, only conversation will work them out in your life.
I first heard about For Women Only when I saw an interview with Shaunti Feldhahn when that book first came out. All the women in the audience received a copy. So I read my wife’s copy to see if it was any good and then highly recommended that she read it.
A couple years later Shaunti and her husband Jeff co-wrote a men’s version of the book. Both books take fairly large surveys of men or women and a lot of focus group data to try to build a case for the important differences between men and women. There is no discussion about nature vs. nurture, just that these are the real differences that actually exist between men and women right now in the US.