I frequently write about love and therefore about jealousy. It’s part of the deal; it’s what comes with love, for most people, in most societies. Of course, it’s also dramatic, and therefore novelistically attractive, because it’s frequently irrational, unfair, boundless, obsessing and horrible for all parties. It’s the moment when something deeply primitive breaks the surface of our supposedly grown-up lives—the crocodile’s snout in the lily pond. Irresistible.
-Julian Barnes in The Art of Fiction, No. 165, Paris Review