After head scratches. There was always time after that. After all, priorities were priorities and neither of them could do anything about that. Head scratches were practically law.
Sirius turned his head into the touch, practically head-butting Remus' hand to get more out of the experience. It wasn't difficult even now to be this kind of demanding because it reminded him of better things. Better times. Even though he hadn't been aware that his own times had stopped being good until so recently.
"No, you definitely started it," he said, forever contrary just for the sake of it. "There's no way I just sat down one day and said Touch My Hair Or Else." Mind, it was always a positive that Remus enjoyed it so. It was part of their -- their -- the thing. The thing they never really talked about.