It's work, but it's the most satisfying and rewarding work they've ever done, both in the short term and the long term. Crowley lowers his head and just breathes for a moment, being in the moment. It's a good moment, with Aziraphale warm and content and next to him.

Then he pushes back and Crowley's breath hitches. It's not that he'd forgotten how aroused he was, exactly, he was just...concentrating on other things. But that small pointed movement definitely recaptures his attention. "I--ngk--" he manages, briefly tongue-tied. "If you want, then...yeah, yes. 'Course." He kisses Aziraphale's neck. "Angel."