Each good novel has a vision of its world that informs what is put in and what is left out. - Marge Piercy

If only I could tell each of them how much more fully I could love them now. I could give them, not the dutiful, selfish and perfunctory love of an adolescent, but an understanding love that would lighten their terrible burdens. (p253)

"He said to me once he had given up a normal life for the cyborgs. As if he could only create life if he gave up loving and living." (Yod about Avram, twenty-eight: HOW CAN WE TELL THE DANCER FROM THE DANCE?)

Like species, couples die out or evolve.