Suzanne, a young woman in San Francisco, met a man--call him John--on the dating site OKCupid. John was attractive and charming. More notably, he indulged in the kind of profligate displays of affection which signal a definite eagerness to commit. He sneaked Suzanne's favorite snacks into her purse as a workday surprise and insisted early on that she keep a key to his apartment. He asked her to help him choose a couch and then spooned with her on all the floor models.