Aziraphale whispering Yes, please, show me has haunted Crowley's fantasies for centuries and it turns out the things his mind conjured all those times isn't a patch on the real thing.

He groans into their kiss, slides his hand from Aziraphale's face down his chest. "I'll make it good for you," he promises, maybe a little recklessly but it's still hard to believe he doesn't still need to ask permission, that it's already granted. "Swear I will, I swear..."

And then his hand is there, covering and cupping that hard length in Aziraphale's trousers, grinding the heel of his palm just a little against it. Crowley groans again and pulls back to see how the angel reacts. Is this all right, is it too much, too fast, can I, please...