Dean's going to have to wait to make that happen again, because surging up in place of that desperate want is the need to make Dean feel just as good as he made Cas feel.

Cas knows all of Dean's hot spots by heart. He'd known about them before, logically, medically, in a way that would never apply to him but now, now-

"Dean," Castiel whispers. He's not even ashamed at unraveling so quickly, because who's going to blame him? He's never done this shit before. Castiel doesn't often feel shame anyway, it's just not programmed into him. He shifts, wipes the mess on his hand on the pant leg of his own jeans, and puts his hands to work.

Before, it was just a massage. Now, now Castiel's purpose is seduction. He strokes his thumbs over Dean's lower belly, lips sucking idly down his neck, toward his collarbone. His hands shift up to his shoulders, down his arms, back up to his neck. He rakes his nails across Dean's stomach, because Dean doing that to his back had felt amazing.