A great deal of modern popular culture — including just about everything pertaining to what French savants like to call le nouvel âge d’or de la comédie américaine — runs on the disavowal of maturity. The ideal consumer is a mirror image of a familiar comic archetype: a man-child sitting in his parents’ basement with his video games and his “Star Wars” figurines; a postgraduate girl and her pals treating the world as their playground. Baby boomers pursue perpetual youth into retirement. Gen-Xers hold fast to their skateboards, their Pixies T-shirts and their Beastie Boys CDs. Nobody wants to be an adult anymore, and every so often someone writes an article blaming Hollywood, attachment parenting, global capitalism or the welfare state for this catastrophe. I’ve written one or two of those myself. It’s not a bad racket, and since I’m intimately acquainted, on a professional basis, with the cinematic oeuvre of Adam Sandler, I qualify as something of an expert.