How we cite our quotes: (Chapter.Paragraph)
Quote #4
Like an echo from the […] past came a clear sense of doing this before, of making love to some woman who was not attractive to me […] and me saying "Oh, darling, oh, baby." (3.46)
For context, Rojack is currently pretending to mourn Deborah's death in front of police officers. This implies that his very love for Deborah was a lie, though we don't think this is completely true. Either way, it once again establishes the connection between violence and death thanks to the much-needed release that both seem to provide.
Quote #5
I did not go on to say that when I was in bed with a woman, I rarely felt as if I were making life, but rather as if I were a pirate sharpening up a raid on life. (4.280)
Well, that's a problem Rojack ol' buddy. Rojack knows that he has a twisted mentality about sex, that he is far more concerned with his own satisfaction than anything else. So why not stop? Why not change his ways? As we'll soon see, Rojack is too hooked to turn back now.
Quote #6
I was the equal of a cigarette smoker who has been three days without a butt—underneath everything I wanted sex now, not for pleasure, not for love, but to work this tension. (5.13)
This is pretty much the same reason that he kills Deborah: to release tension. Furthermore, it once again establishes that Rojack is addicted to sexuality just as much as he's addicted to alcohol and violence. Maybe he had self-control at some point, but those days are long gone.