Crowley had lived close to 400 years. He'd been around the block a time or three. he knew what he was doing, though the angle posed a challenge, his tongue worked her over fully. Without the use of his hands, he had to improvise, but judging the noises Anna made and the way she pressed herself down on him, he was pretty sure she wasn't going to complain.
Crowley had never been particularly obsessed with sex. he enjoyed it, from time to time, with the right partner. Anna definitely made it enjoyable. He liked the way her Grace almost-but-not-quite burned him, and the effect his hellfire had on her. It was a perfect balance of give and take, push and pull.