Lyubi suggested one of my favorite kinks which I've only drawn once and it almost didn't count: cockwarming. Paired with another favorite kink which I've never drawn: consensual somnophilia (sex while one partner is asleep, with permission). Aziraphale was running his fingers over Crowley's back, murmuring in his ear, and Crowley just felt so comfortable and cared for, they fell right asleep. Aziraphale will wrap that cashmere blanket around them, miracle a book over from the shelf, and do his very best not to come until Crowley wakes up. Might be a little while.