The Huntsman Cancer Institute at the University of Utah says they may have found a link between having multiple tattoos, and having a lower risk for skin cancer.
From Fox13Now in Salt Lake City: "The team, led by Jennifer Doherty, the co-leader of the Cancer Control and Population Sciences Program, evaluated 7,000 Utahns. They found that those that have had 2 or more tattoo sessions decreased in risk of both invasive and in situ melanoma...
So if you only have the 1 tattoo, you should probably go get another one, or 17.