No love exists in a vacuum, no matter how much it feels like it does. It is filtered by all the loves we’ve ever read about, witnessed, watched, lived. Its definition is given by use (to nod at Wittgenstein). Love changes in each phase of a relationship, each day, even. As we, too, change constantly. Nor can love be proven. It’s more complicated, harder to see than a ring, a marriage license, a description of any physical encounter.