Another complicating factor of all this is "The Pleasure Trap" of "Supernormal Stimuli" and "The Acceleration of Addictiveness" in a society far from what humans are adapted for.
From the last: "We were never designed for the sedentary, indoor, sleep-deprived, socially-isolated, fast-food-laden, frenetic pace of modern life. (Stephen Ilardi, PhD)"