How we cite our quotes: (Record.Paragraph)
Quote #7
I looked silently at her lips. All women are lips, all lips. Some are pink and firmly round: a ring, a tender guardrail from the whole world. And then there are these ones: a second ago they weren't here, and just now—like a knife-slit—they are here, still dripping sweet blood. (13.13)
Sexuality is being used as a reduction here: to reduce all women into a single "woman." Even in the throes of his awakening humanity, D-503 still tends to think of things in State-approved terms.
Quote #8
She comes up close, leans on my shoulder, and we are one, she flows into me and I know: this was the necessary part. I know this with every nerve, with every hair, with every sweet and almost painful beat of my heart. And I submitted to this "necessity" with joy. (13.14)
Here, sex becomes a sort of transition, a way of helping ease the shift into a full human soul. He understands that there's pain involved and chooses to go forward anyway.
Quote #9
And hence, if "L" signifies love and "D" signifies death, then L = f(D)—that is, love is a function of death … (24.2)
Love and death are the great themes of Western art, and the sex act has sometimes been compared to dying (in the best possible way). Again, it's a way of connecting the sex act to the larger realities of the universe, and the way the State seeks to both explore those realities and eliminate the ones they find inconvenient.