The best kind of friends are the ones that you share good times with. A friend who can make you laugh is worth a handful who can't. So often we walk around with the weight of the world on our shoulders. Our bodies become tense and this is a cause for most illnesses. Having humor in your life is not just a matter of a good time, it's also a matter of living longer. Often when you have a friendship that has lasted a long time you continue to share memories of humorous interactions that you shared. This may be the glue that holds the friendship together.