We need other people . . . love and crave other people. Without a singular bond on a romantic level, and/or multiple ones at the family and friend level, it's hard for most of us to be happy. Good relationships with others -- and having a real buddy you can talk with anytime -- can help stave off depression and add years to your life, especially if you're trying to weather stress storms. Laugh with friends and family and you'll do yourself even more good: Laughing lowers blood pressure and releases endorphins that can ease pain. TiVo Jon Stewart, Jay Leno, or David Letterman and watch while you and your spouse do sit-ups and push-ups or walk on a treadmill. While the health benefits of a safe monogamous sexual relationship are extremely important, research also indicates that strong social ties, such as having a best buddy, are super good for you, too. ~ Mehmet C. Oz and Michael F. Roizen