Passionate Marriage: Keeping Love and Intimacy Alive in Committed Relationships 
Schnarch says that a man is more likely to let a relationship suffer in order to hold on to his sense of self, while a woman is more apt to let her identity suffer to help strengthen it. Schnarch gives explicit tips on how to alter this pattern, an essential step he calls "differentiation." He also explains why compromise isn't always the best route to take when conflicts arise. The couples profiled here deal with the usual suspects: uneven sexual desire and initiation, battles about oral sex, self-image problems, the "boondoggle" of trust (both of one's self and one's partner), and the specter of divorce. Instead of focusing on each client's weaknesses, Schnarch teaches how to find inner strength and resilience that can be used to reaffirm a relationship and reignite sex. William H. Masters of Masters and Johnson fame calls this book "a classic," and no wonder. --Erica Jorgensen
Reviews
Definitely get it if you need help in this area. Another sex book that helped me was "Good Sex, a woman's guide" as well.
It provides a lot of information in a pleasant and easy to understand, and apply way. My wife was also fascinated and eagerly read it. It helped us to turn our conflicts into a positive and constructive tool, which we use to improve several aspects of our marriage now. It is especially helpful for couples who have lost more or less their intimacy and are willing to put some efforts to get it back. Trust me it is well-worth the time, conversations and the satisfaction of knowing that tomorrow will be better than today.
Dr. Schnarch's book also contains a chapter about better sex. It is quite explicit. I know from personal experience that mature men tend to develop serious problems such as premature ejacul., (semi) impotence, etc, which have very negative effect on a marriage. That's why in addition I highly recommend the bestseller "Scientificlly guaranteed multiple orgasms & ultimate sex" by scientist Ritz, which helped me to overcome quickly my problems and started enjoying great pleasure in bed.
