It was like those moments in your most intimate relationships when you look over and are startled to remember: that other person is not you and is not yours to define. He or she suddenly seems to be some alien whom, inexplicably, you have decided to trust. Even as the two of you lie wrapped in each other's arms, you know that he or she can exist without you, and does just that now and again, in moments, and sometimes over longer stretches of time: sheds you. Yet you continue on, together. And that, too, I think, is an imperative of love.