They could be closer. He thinks about the way it feels when they share their love, that feeling of being completely connected to someone, and he wants that. He wants to be completely connected to Aziraphale, to feel him inside and out. To be surrounded by him utterly. Aziraphale who will always be the better part of the two of them.

He traces the angel's lower lip with his tongue as they kiss, tasting him, asking for more. There is always the notion of 'too fast', and Crowley will never go faster than the angel would want---but he does want to kiss Aziraphale more. He wants to know him better.

He wants the chaos they live in to dissolve into the love they feel for each other.