"Oh, god, Sirius," Remus moaned in a broken voice as his fingernails scraped Sirius’s scalp and his fist closed around a handful of hair. Sirius felt Remus’s hips stutter forward and stop abruptly, as though he was holding himself back. That was no surprise, Sirius thought. Remus was an expert at holding himself back, but Sirius wanted to give him everything, and wanted Remus to take what he wanted, too.