In the late 90’s hit single, “Everybody’s Free (To Wear Sunscreen),” Baz Luhrmann offers sage advice in a unique and catchy graduation-ceremony-put-to-music format. He begins by telling his listeners to wear sunscreen, because the benefits are “well-documented by scientists.” The rest of the advice, he tells us, “has no source more reliable” than his own “meandering experience.” (If you didn’t...