Margaret George said this quote

Lying in bed, half-covered by the blankets, I would drowsily ask why he had come to my door that night long ago. It had become a ritual for us, as it does for all lovers: where, when, why? remember...I understand even old people rehearse their private religion of how they first loved, most guarded of secrets. And he would answer, sleep blurring his words, Because I had to. The question and the answer were always the same. Why? Because I had to.