So there I was: Leafing through my Facebook settings to remove the random advertisements for real estate firms in Arizona and automobile dealerships in Florida that Facebook always so helpfully attaches to my feed. It's astonishing the things Facebook decides I outta be interested in. Making my life more surreal seems to be quite the profitable business model, so I go through all my settings every couple of weeks to see what odd little thing Facebook has slipped in there now. A month or so ago, for instance, I found a box labeled "T-Shirt Design", a topic about which I'm fairly certain I've ever had a complete thought in all my life. And today, under the "Fitness and wellness" tab of the "Your interests" section was a single box labeled "Human Eye." Now, yes, I've always been generally interested in the human eye—I mean, many of my best friends have them. ...