There are arguably only three lifestyle behaviors that are imperative for survival. We can, for instance, survive without working, reading, listening to music, writing, traveling, or driving a car. However, humans (and animals) have to eat, move, and sleep in order to maintain life. All three of these behaviors have been linked to obesity as well as cancer. Thus, not only do obesity and cancer share some common mechanisms, consequences, and reciprocal influences, as shown in previous chapters, they also appear to be influenced by the same lifestyle behaviors.