There can definitely be too much of a good thing. Most of us are familiar with the concepts of physical and psychological addiction. In the former, you need to increase the dosage of a given substance or behavior to get similar results, and when you remove the high, you have physical withdrawal symptoms, ranging from nausea to organ failure. In the latter, you might develop an emotional dependence or habituation, and when you remove the high you experience irritability, distractedness, or insomnia. Pushing all the buttons of our reward circuitry works better than most people imagine and can
...more
