"We are not nearly drunk enough for this conversation," Aziraphale told him primly.

"Although, and I will say this, for what used to be a Satanic hospital, one must wonder at the nuns' choice in reading material... ? Really, my dear, is it all simply hyperbole?"

He was, of course, recurring to the very arcane texts of the sexual habits of demons. Inspired, possibly, by the legions of Incubae, or in several cases, Succubae?