Marcus watched as the leatherneck bent over, giving him easier access to the dark pucker. The older man didn't hesitate as he pressed the tip of his cock to the small opening and pressed in. His hands gripped the other Marine's hips tightly, fingers digging into the dark, slick skin as he could feel the ring of muscle stretch tightly, and every ridge could be felt sliding over the head of his cock. Fuck, the other man was tight, as tight as the boy, but Marcus knew the dark Marine could take a good ass pounding whereas the boy couldn't.<br/><br/>Grunting lowly, the crown suddenly popped through the tight ring and Marcus grinned. Goddamn, that felt good. His fingers squeezed tighter on the other man's skin as his hips began a slow thrusting, sinking his cock further into that dark heat. He could hear the other man groan loudly at the penetration, but Marcus didn't stop. Chaz had stopped his thrusting into the boy for a moment to allow Marcus to seat himself fully inside, and then they could set up a comfortable rhythm.<br/><br/>With each thrust, the muscle was stretched, and his fat cock slid further inside, until eventually his low hanging sack brushed taut skin and fur. "Goddamn, you're as tight as my boy over there..." Marcus chuckled softly once he bottomed out. He enjoyed the heat and tight pressure around his shaft for a moment, then his hips retreated as he began the thrust. The dark marine hissed as he did the same, pulling out of the boy just as Marcus was thrusting inside him, and the lusty, wet sounds of bodies slapping together began to fill the room, heavily doused in the scent of male sex.