Ah, but Crowley, haven't you managed to catch on yet? Over time, John Blake has been slowing chipping away at your defenses, and you might not know it, but he's long-since found your vulnerable areas. It's a credit to Crowley, though, that Blake doesn't need to use that knowledge against him... yet.

For now, he just takes the whimpering to mean good things and focuses on Crowley's clear desire (by way of his own). In one long, long lick, he draws his tongue over the length of the demon's penis, from balls to tip, like he's indulging in some kind of dessert.