" Apparently, the draw of the screen is just too much for most people; the cell phone is like a slot machine. With every ding, a variable reward, either good or bad, is in store for the user—the ultimate dopamine rush. As Robert Kolker wrote in the New York Times Magazine, “Distraction is the devil in your ear—not always the result of an attention deficit, but borne of our own desires.” We are distracted because we want to be. Because it’s fun and obfuscates real life. Why else would they sell so many smartphones? My wife says that I’m addicted to my e-mail, and I know looking at it doesn’t improve my mood. "

― Robert H. Lustig , The Hacking of the American Mind: The Science Behind the Corporate Takeover of Our Bodies and Brains