“I’ve certainly scolded myself for an hour or more blown on a flow of dog videos, family updates, shallow political expressions, and pleas for funds. Every one of those items has some value to me, just as each potato chip delivers some pleasure, some flavor. I savor them. But I lose count. And upon reflection I feel just horrible. But the thing is, snack foods are explicitly designed to make us behave this way. Food producers have studied, mastered, and tinkered with the ratios of salt, sugar, and fat to keep us coming back, even when the taste of much of the food is unremarkable. Facebook is designed to be habit-forming in just the same way.”