People buy a lot of books about sex. They may not always want to talk about it, but they sure have a lot of questions. It's one of the most common marriage issues, responsible for heartache, dissatisfaction, and distance. In fact, over 70% of couples are mismatched in expectations and frequency alone.
In the largest study ever conducted about sex, relationship researcher Shaunti Feldhahn and nationally renowned sex therapist Dr. Michael Sytsma...