Both of his hands pressed to the wall and Dean took in a sharp breath as Sam started thrusting hard into him. It was almost to the point of pain but Sam's hand on his length made it feel so much better that he was almost dizzy with pleasure. He could feel Sam holding onto him so tightly and it was making him insane with need and want and desperation and just SamSamSam.
The purred words sent shocks through him and Dean moaned low in his throat, his eyes almost closed as he tilted his head enough to look over his shoulder at Sam. "Feels so good, Sammy. Son of a bitch, you're so big, fuckin' me so hard," he told him, fingertips dragging against the tiled wall. "That's it, baby, fuck... yeah, that's my boy, fuck me hard." And Dean was pretty damn sure he'd just lot all of his mind.
Reaching one hand down to slide it along Sam's arm, Dean moaned roughly, his breathing so shallow he thought he might pass out if he didn't calm down. "Gonna come soon, Sammy," he warned, shuddering a bit.