Sex. It can ignite our senses, fill us with ripples of pleasure and awaken a new dimension of feeling for our partner. Lovemaking doesn't require extraordinary skill, nor is it limited to young couples in the throes of passion. Couples of all ages can cultivate sexual bliss for the duration of their lives together.

So what's the trick? One of the most important and often overlooked components of a rewarding sex life is exercise. Regular exercise can pique sexual desire and make sex more enjoyable.

Good Sex Is a Good Thing

Though definitions vary, "good sex" might be thought of as an act of intimacy that promotes health and well-being. Good sex provides significant physical and physiological benefits. Enjoyed in the context of a happy relationship, "sex boosts chemicals in the body that protect against disease," says Paul Pearsall, Ph.D., author of the book "Superimmunity."

Research also suggests that sex and masturbation can help ease joint and muscle pain, combat depression, promote heart health and lengthen life span.

All too often, however, we haven't the time or energy for sex. According to the Masters and Johnson Institute, at least a third of American couples experience a lack of sexual desire. After a stressful day at work, it's easy to neglect the ultimate celebration of human pleasure.

There are ways to ensure that lovemaking remains a passionate, intense and regular part of our repertoire no matter what our age or how busy our lifestyle.