[He's silent for a breath that's devoted to taking all of that in. There's something building a woman up to climax that could well enough take his breath away, and on her its only ten times more effective. Her genetics are flawless and she's one of the most beautiful women he's ever laid eyes on-- but it's more than that. Fascinations festered from things she's done and said, the way she stubbornly refuses to give up and... whatever cause has her allowing him to do this to her. Genuinely liking a woman makes giving her pleasure like this all the better, his eyes attentive and entranced by her responses.
He takes a slow, steady breath and doesn't still his fingers.] Since we can't have a load of proper sex, I'll have to make due with other means for twice as long. [There's nothing he's really thinking about right now but how it would actually feel to fuck her, but that's crude and he's not quite sunk enough into his own pleasure to let it slide off his tongue.]
I'd prefer you on your back in a bed, though. [Not just some flat rock.]