It's not so much Pavlovian as it is directly causal: Aziraphael's fingers ghost over Crowley's ear, and Crowley pushes his hips up against Aziraphael's once more (hissing; eyes more closed than not).



"Oh, don't worry," he manages when it recedes. His tone is passably airy, but threaded through with promise nonetheless. "I'll be calling in the debt."