According to Dr. Phil, there is no magic number that can tell couples how often they should be having sex in order to be "normal." Instead, he encourages people to discuss their needs openly with their partners and negotiate a relationship that meets both of their needs.
Having said that, here is what the latest research says about how often Americans are — and aren't — having sex.
Married couples say they have sex an average of 68.5 times a year. That's slightly more than once a week. — Newsweek
Married people have 6.9 more sexual encounters per year than people who have never been married. — Newsweek
15 to 20 percent of couples have sex no more than 10 times a year, which experts define as a sexless marriage. — Newsweek
20 to 30 percent of men and 30 to 50 percent of women say they have little or no sex drive. — USA Today
25 percent of all Americans (a third of women and a fifth of men) suffer from a condition known as hypoactive sexual desire (HSD), which is defined as a persistent or recurring deficiency or absence of sexual fantasies or thoughts, or a lack of interest in sex or being sexual. — Psychology Today