The word "addiction" is used more commonly today than ever before. While it may refer to somewhat benign behaviors, like drinking coffee or watching a favorite television show, it can also refer to a dangerous obsession with a self-destructive substance or behavior. Some medical professionals believe addiction is a psychological condition, while others claim it's a physiological problem. As a topic that attracts so much controversy and debate, it's easy to see why the true meaning of addiction may be unclear. Is addiction a physical disease? How does it develop? Is it hereditary? Can it be cured? All of these are common questions that tend to have complex answers.