If you could take a pill daily that would lower your blood pressure, reduce stress, boost your immune system, and promote bonding with your mate, wouldn't you do it? You don't actually need a pill to tap these much-needed benefits. There's another way that's more fun, with no side effects: having sex with your mate. So why do so many couples let their relationships fall into a sex-free zone? It starts with your pressure-cooker job, on top of your load of household chores. Add your husband's own stressed-out work life, his ailing mother, and some unexpected bills that are throwing off your budget. Pepper the mix with two small (or large) children, and what you have is a recipe for a couple who would just as soon collapse on the couch as shimmy under the sheets. This scenario is so common that therapists have an acronym forit—DINS, as in "dual income, no sex." And it's not only men who are unhappy about it. According to an Australian study in the Journal of Sex and Marital Therapy, 28% of women ages 35 to 54 who are married or in long-term relationships would like more sex, please. With 53% of the men also reporting dissatisfaction, that means at least half of couples are experiencing a "desire gap."