Early in their courtship, Dean (Ryan Gosling) serenades Cindy (Michelle Williams) on a city street, late at night, with the pop standard, “You Only Hurt the One You Love”. By the time we see this moment, in flashback, it’s already quite clear that in the present, they’re making good on that song’s title. But something else interesting is going on beneath the surface of the youthful romantic exuberance of the scene.