I tan very easily and I've always wondered why. Never would I have made the connection between the color of my skin and happiness. But here it is, as explained by Dr. Jablonski - there is a connection. It turns out I need the sun to stay healthy physically and mentally. Perhaps that's why when the beautiful golden sun outside is at play, it has me longing to rip away from the desk and be out and about. Even though I can't stand hot weather.