Arthur's breath caught in his throat when Stark gave a sharp snap of his hips. He was fairly sure that Tony would be able to keep him riled up if he wanted to. "Oh," he said but it came out more like a groan than it did a certain word. "Mm, no - I have no doubt that you would if you wanted to." And truth be told, a small little part of him wanted Tony to keep him here. But he did have a job to do and he needed to probably get up and go.

He leaned up and nipped at Tony's bottom lip.