You live for what? I'm in early 40th now. It is the turn-around point of my life. Of course if I live until average longevity. Some friends have chronic disease, some friends worry about their wrinkles and mottled skin. Nothing can be done about physical deterioration even if you exercise every day or eat a lot of vegetables. However you can keep your life happily. What would you do for? I'd like to meet many people around the world before I die.