Aziraphael attempts to thwap him on the head, but as the angel's arms are still doing duty propping him up, it's ineffective at best (meaning he almost completely misses).

"I didn't realise we were still on that topic," he says with as much dignity as he can manage from this position. "And anyhow."

He leans even further to the side, holding Crowley close so that they roll over together.

"Perhaps you won't need to get started with wings after all," he says, grinning up at him.