Excessive tanning, obsessive tanning, tanorexia, tanning addiction, whatever you call it, tanning too frequently and for too long is dangerous. Intentionally exposing your skin to ultraviolet (UV) light, either under the sun or in a tanning bed, doesn’t just cause you to wrinkle prematurely, it causes cancer. This comes as no surprise to most people. We all know that this kind of exposure can be deadly. So why do so many people, particularly young women, continue to over-tan? New research is providing some answers.