Crowley moans, rubbing his palm over Castiel's skin with a hint of nails here and there. He can take a lot more than this and he'd love to. With what little leeway Castiel gives him, he moves his mouth enthusiastically on Castiel, working his tongue and lips.

The angel looks like complete sin and Crowley is more than a little turned on himself. He rolls his own hips against the bed. He doesn't expect that Castiel will quite be up to returning the favor, but this is a completely erotic experience for him. He'll be content as long as he gets off in close proximity to Castiel. He expects perhaps a handjob and that's more than enough after he gets to see Castiel like this.