Biology: Sexual Healing

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It's well known that married folk tend to live longer and suffer less depression than singles do. But is this because of more frequent sex, simple companionship or some benign aspect of personality that lends itself to marriage? Teasing apart such matters is difficult, but sex itself appears to be factor. A study of 3,500 Scottish men, for example, found a link between frequent intercourse and greater longevity. A much smaller study of elderly men found that those who masturbated appeared to experience less depression than those who did not. In addition, frequent sexual activity has been tied to lower risk of breast cancer in women and prostate cancer in men, a relationship that is still not fully understood but may involve some interaction between oxytocin and the sex hormones estrogen and testosterone and their roles in cell signaling and cell division. "Scientifically, it's an exciting time that will lead to a lot of rethinking and reconceptualizing of human sexuality," says Dr. John Bancroft, director of the Kinsey Institute. As the answers come in, the human race may begin to appreciate that the "sex glow" stays with them a lot longer than they realized.