Sirius breathed in through his nose and out through his mouth as his palm slid over the rippling contours of Remus’s back, across his shoulder blades, down his spine, and up and over every single rib. He pressed his thumb in long strokes up the firm tendons in Remus’s neck, down the sides of his narrow torso, and across his lower back. His skin was shining and slippery under his hand, and Sirius ran his fingers upward once more, dragging them across the tops of Remus’s shoulders and up the nape of his neck, where a tangle of sweaty curls clung to his skin. Remus let out a little sighing huff of breath, and his head tipped gently to one side, revealing a long expanse of golden neck that Sirius wanted to just...