Does your spouse or significant other think you are strange for talking to everyone in sight, even if you don't know them or not? Well this can actually be very healthy for your heart, and it can prolong your longevity. Face to face interactions have been shown to have more power than even exercise when it comes to keep you alive. This interesting article may change the way you interact with the world, starting today. So go ahead...………...SAY HELLO to someone you don't know.