We throw the term around quite a lot. Addiction.
Sometimes with the seriousness an unhealthy compulsion deserves, other times lightly to describe drawing pleasure repeatedly from the same source. As much as addiction can refer to an undesirable dependency on what's perceived or proven to be harmful, It can also simply point towards a feedback loop that is also very human to desire. When a person, an identity, an activity, a thing to be consumed or just a state of mind become pleasurable, It's only natural to want more of it. In some cases, we repeatedly do things we perceive as the only way to exist, even though they offer us no true pleasure in return.