The sun has been around for billions of years. It is highly likely it will be around long after the humans currently alive are no more. There are good attributes of sunlight which are experienced all the time. Photosynthesis provides the earth life giving oxygen. Heat is also important in sustaining life while light help separate night from day. Gravity is also an important present. One of the major problems with sunlight is observed when skin is exposed to it for long periods. This can precipitate life threatening problems. For this reason a sprayon tan is definitely a smart move.