Of course, Crowley hadn't really thought he could distract Lucifer from this-- (very annoying) cat with prey, after all-- but it had been worth trying.
He imagined this must be like going up to a cocaine addict and blowing a cloud of it in their face. He had to keep his hands tightly clasped to resist wiping the blood, and keep his mouth firmly closed so he wouldn't try to lick his lips.
Clearly, Lucifer was hitting all kinds of nerves now.