Some days, Rodney has no idea what the hell he's doing. Well, that's not completely accurate. He knows what he's doing in the lab, of course - equations and simulations and sliding his chair from workstation to workstation, yelling at people as necessary along the way.

He has no idea what he's doing with John. He has every idea about what he's doing to John; his balls still ache from the night before, and he's pretty sure that John will be walking funny for at least a day.

The night before, Rodney got out fast. He came down from the endorphin high and looked down to see John sleeping soundly against his chest and eased away as slowly as he could. John made a sleepy protest noise, then rolled over, and Rodney dressed quickly and left.

Back in his own bed, he couldn't sleep, so he hit the labs and hasn't moved since.

"Hey."

Rodney spins his chair around, and John is standing in the doorway. He looks a little...fucked up. His hair is as messy as normal; he's wearing his usual uniform pants and black tee shirt and boots, but there's something about his face. Tired eyes and a slackness about his expression that Rodney can't read or identify past "fucked up."

"Hey," Rodney replies, and he can't decide whether or not to spin his chair back around to his workstation.

"Breakfast?" John says, and Rodney tries to think it through. They usually have breakfast together, so it's normal. But he's more shaken about the night before than he cares to admit. Something essential changed, and Rodney's not sure if he's ready to deal with the inevitable fallout.

"Sure," he says anyway.

They don't talk on the way to the mess hall. They get their food and sit down at the team table across from Teyla and Ronon, who greet them quietly. When John reaches for the pepper, his sleeve rides up and Rodney's the only one who can see the bruise on the back of his tricep. Rodney clearly remembers the heels of his hands pressing down into that muscle, pinning John to the bed. He barely stops himself from reaching out to touch it.

When John sits back down, he glances at Rodney then puts pepper on his eggs. When he leans to put the shaker back, he stretches a little more, lets Rodney see the bruise more clearly. It's hot. Very fucked-up, but very hot. Then John eats his breakfast with a small smile on his face the whole time.

They push their trays back, and John glances at Rodney. "Didn't you want me to help you with that stuff in the lab, Rodney?" When he says it, he reaches up to his shoulder as if to scratch, but Rodney knows he's touching the bruise on his shoulder. Rodney wonders if the teeth marks are still there.

Rodney nods. They say goodbye to Teyla and Ronon, then drop their trays off at the cleaning station. John ghosts a hand over the small of Rodney's back, moving him toward the transporter. Once they're inside and the door shuts, John looks hard at the console and the transport process doesn't start.

He gets a quick view of the tight smile on John's face before he's pushed down by a hard hand on his shoulder. He goes readily, and he's got John's pants unbuttoned and unzipped by the time he's settled on his knees. John's hand stays on his shoulder as Rodney pushes the BDU pants down to the top of John's thighs. John's bare underneath, and that just makes Rodney hotter. He pushes the pants down even further and goes down on John as hard as he can, not stopping until the head of John's cock is skirting the edge of his throat.

John spreads his legs as much as he can, bending his knees to get as much leverage as he needs to fuck Rodney's mouth. Rodney rolls with it, moving in counterpoint, snatching a breath whenever he can. He unclenches one hand from John's hip and slips it between his legs, reaching behind his balls.

He touches the edges of John's hole and pushes one fingertip inside, expecting resistance. But there's not as much as he thought there would be - his finger slips in easily, and he realizes that John's still slick from the night before. That what he's touching, what he's fucking his finger into, is lube and his own come. That makes him press in with two fingers, just to get as much of that sensation as possible.

John gasps and groans, and Rodney knows he's sore, but he can't stop himself from fingerfucking John, though he does try to make it slower and a little bit more gentle.

John gets his hands on the sides of Rodney's face, holding him still and fucking his mouth, and each stroke makes his ass clench around Rodney's fingers. Rodney feels John's cock swell in his mouth and grabs a quick breath in anticipation of swallowing him down. But John lets go of Rodney's face and pulls out to come in his own hand. Rodney lets his fingers slide out as John's ass flutters against them.

"Get up," John says hoarsely, and Rodney does, a little dizzy. His cock is aching, and he feels shaky all over. Once he's upright, John lunges at him for a hard kiss, then pulls back abruptly. He uses his dry hand to open Rodney's jacket and wipes his come on the inside, close to the top.

"Now you'll smell like me all day." John's voice is rough and he's still panting.

Rodney smiles, and he can feel the edge to it. He reaches out and slips his fingers under the collar of John's tee shirt. He wipes the lube and his own come that came from John's ass against a sharp collarbone.

He leans in and bites John's chin. "And you'll smell like me," he says, grinding his cock against John's thigh.

John reaches down and gives Rodney's dick a hard squeeze, then pushes him back. "Save that for me," he says. "I'll come get it later."

John pulls himself back together, then restarts the transport process. When they get out, one hallway over from Rodney's lab, John gives him a small wave and saunters off, his hands in his pockets. Rodney watches John's ass until he turns the corner, then zips his jacket to conceal his hard on. He's hit by the scent of John's come, and he looks forward to later.