New research is designed to help calm couples' unrealistic beliefs that "good" sex should last a long time.
No time for sex? Good news: U.S. researchers have found that sex lasting seven to 13 minutes is the most desirable. The study, published in the International Journal of Sexual Medicine, polled a random sample of Americans and Canadians, and also found that intercourse lasting between three and seven minutes was "adequate"—and that sex over 13 minutes is "too long." Surprised?