Supernatural, Sam/Dean, rocking it
For once, it's Sam's massive hand on the radio dial, fiddling with it when he should be working on the zipper to Dean's jeans, if you ask Dean. He finds a late-night rock station and Dean grins at the song, because, seriously, "You Shook Me All Night Long?" Like he hadn't already made out to that song countless times over the years, with just as many pretty faces, in this exact same spot (back seat of his beloved Impala). He kind of forgets how freakin' cliche (and yet so very perfect, if that's not a sign that Dean should be getting some right then, he doesn't know what is) when Sam presses him back down into the seat, mouth covering Dean's and dragging his tongue across the seam of Dean's lips, like Dean's gonna fight him. He's got one hand on Dean's thigh and the other curled behind Dean's head, and Sam can't be comfortable, all his height and muscle shoved into the confined space of the back seat.
Dean's hand slides down Sam's back, following the bumps of Sam's spine and moving to cup Sam's ass, which is one of Dean's favorite parts of Sam, actually. Sam grins against his mouth and slides his hips forward, clothed erection against clothed erection, not nearly enough friction. Dean decides to just go ahead and end Sam's teasing streak right there and slides his hands around to unbutton and unzip Sam's jeans, because the faster Sam gets undressed, the faster Dean gets fucked.
Sam smirks and moves to mouth at Dean's neck, somewhere right around the middle of the guitar solo, one hand moving from Dean's thigh to free Dean's erection and attempt to push Dean's jeans off and away. They get trapped, of course, because there's no fucking room in Dean's car (but that doesn't make it any less perfect in Dean's eyes) and Dean has to shift up and press his hips against Sam again in order to get them off and the friction this time is fucking beautiful.
About the time Dean finally gets his legs around Sam and Sam gets a slick finger in his ass, AC/DC's faded into Zeppelin's "Whole Lotta Love" and this is quite possibly the best sex he's ever had in the Impala. By the time Sam actually starts fucking him, he can only kind of hear the music over Sam's breath in his ear, and he knows for a fact that Sam's totally off-beat with the music, but it's perfect. He even actually tunes the music out when he realizes that not only is he moving from the force of Sam's thrusts, but Sam's also got one hand braced against the window, and the Impala is rocking back and forth like some kind of cliched teenage make-out movie. And that's hot.
And then Sam gets a hand around his cock and that's it, he's done for.
He comes down and Sam's grinning at him. Zeppelin's faded into "Home Sweet Home" by Motley Crue, and that's a cuddling song, not a sex song, so the station kind of loses points for that.