"And yet," he says against Aziraphale's lips. "Here I am."

Crowley lets out his own moan as his movements speed up slightly, thrusting just a little deeper into the angel. No, he's not supposed to feel love. He's not supposed to want love or make love or do any of those things, and yet here he is. The end of the world? Not hopeless. How lost Crowley is for Aziraphale? Yeah, that's a bit hopeless.

He reaches his hand between them to stroke the angel as he moves, keeping in time with his thrusts.