Aziraphale is surprised-- well, surprised might be too strong a word, as he certainly isn't startled when Crowley kisses him in such a way, and his eyes soon flutter closed as he leans into the kiss.

So many words at once, but no idea where to start. If a picture is worth a thousand words, how much is a gesture, and how much is a kiss shared between two entities that have orbited each other for millennia?

Unsure but tentative, careful hands reach over to wrap gentle arms around the demon.