"Terrible, I know," says Aziraphale remorsefully, twitching lightly at the reproachful flick. He smiles, rather delighted by the reaction his touch has, rubbing his fingers a little harder over the line between soft flesh and smooth snakeskin. His smile broadens to an outright grin as Crowley awkwardly (so cute when he's awkward, aww) explains the snakeform genitalia. It's almost a little tempting. Especially if Crowley's going to be like this about it.

He gasps shrilly when Crowley squeezes him harder and strokes at his neck. Damn him, proverbially of course, he knows that's a particular weakness.

"You know, I think I would," he says, faint but no less cheeky.