Hombrito culo

He knew culo was ass. He done pick up on that. What was a hombrito culo?
Much to his surprise, one of those Mexicans mounted Sazonito, who situated a pillow under his belly, near his crotch, like it was a plastic pussy and he was gonna fuck it. The pillow propped up his ass at an angle.
That angle also made his asscheeks separate enough that Cody caught another strong whiff of his masculine aroma, joined by the scent of the other Mexican who got behind him. He kneeled behind Sazonito, lining his cock up with Sazonito’s ass.
Cody sucked in his breath. Was this normal? Was he gonna stick his dick in Sazonito’s ass?
It was Nelson who mounted Sazonito. Nelson was the oldest in the apartment. He was wiry and short, wrinkled but powerfully built, like a dehydrated weightlifter. He mounted Sazonito’s massively muscled body from behind and slid his limp cock into Sazonito’s asscrack.
“Aaaah…” Cody’s eyes opened wide. What the sam hill was going on? What Mexican craziness was this? He wanna stand and jump up and down — if he was surrounded by his own kind, that’s what he would do.
But the Mexicans were all treating this as normal, and Cody didn’t want to look like a squeamish, giddy anglo.
As far as Cody knew, no man who went to prison would bare his ass, raised up like that! And Sazonito was just doing it! Letting Nelson get in position to stick it in him! Cody still weren’t even sure that cornholing was a real thing, and apparently it was just happening, easy as pancakes!
“!Ay ay!”
Sazonito’s asscrack was warm and slightly wet with sweat, and the butthairs gave a little friction, it seemed. Nelson humped Sazonito’s buttcrack while watching the teevee screen, and he used both hands to squeeze Sazonito’s meaty cheeks against each other, his wrinkled old knob in between ’em.
It took Cody a few seconds to realize that’s what a hombrito culo was — not cornholing, it was just humping the buttcrack. It must be a prison thing. Or a Mexican thing, since they all knew about it but weren’t all ex-cons. Or maybe it was a Latin Kings thing.
From Roommates in the Dark

Shoulderbladin’

His back muscles were broad and firm and slick with sweat. He flexed his back and shoulders for Teddy, making him shiver with desire. It produced a little valley between his shoulder blades. Teddy slid his cock between the valley, the slickness of the sweat gathering there making it glide with no friction. He held back a moan, not sure if that would embarrass Buck.
“Man, in county lockup back in Oklahoma, I was there for like a month,” Buck said, no longer watching the movie because the pretty lady was gone. “And they done that, whatchoo doin’ all the damn time. Indian fellahs love it, they do it a bunch. Shoulderbladin’.” He shrugged, unaware of how that sent a wave of friction and pleasure up Teddy’s spine. He laughed too, making Teddy’s cock spasm and leak precum onto his skin. Buck said, with kind of an embarrassed-little-boy leer, like he was tattling to his mother, “This one time I let like ten of ’em do it, and they all nutted in my hair. It was like wringin’ out a sponge.” He laughed sheepishly.
From Aroused by Ex-Cons

Pitnutting

Pitnutting was a common practice among some prison gangs. Buck done work out his inhibitions over that long time back. So this afternoon, when he and his work-crew was just about done, they got to chatting about females. Buck ain’t get lotta man-talk about ladies these days, since he be bunking up with Jeb the preacher’s boy.
So when he and Gooey got to daydreaming out loud, they both was hard in seconds. Gooey was Gui Tengku, Buck’s partner on the Valve Crew. The rest of the Crew was scattered around monitoring, repairing and cursing at the valves that kept the rig working.
Gooey was Malay, and he ain’t a big man. He was skinny by Buck’s standards but ripped, muscles so tight and taut they looked painful, and the trackmarks on his arms was big like pimples. He got a hardon and stuck it in Buck’s shirtless armpit with a big grin — he ain’t even know Buck was down. He just smiled with bloodshot eyes dull-glassed, as his cock humped its way in and out of Buck’s armpit hair. “Whatchoo doin’, Gooey?” Buck asked with a jagged-dagger laugh, watching Gooey’s pecker poke out his armpit. Eventually, in halting English, they negotiated, even as Gooey’s dick still rubbed precum into Buck’s armpit hair.
The agreement was that Gooey would hand over a dub of weed and that Buck would let him keep pitnutting until they contract was over. Neither communicated this well — Gooey thought Buck done promise to smoke the weed with him, while Buck thought it was a one-time transaction.
So they was gonna be steady disputating the details, but for now, both thought they was on the same page.
Then the rest of the Valve Crew showed up, and they all got to nutting on Buck’s back just like Gooey was doing when they walked in. There was Agebisu, the portly Ivorian with a French accent, a trio of hairy and truculent Turks, a older Uzbek with gray hair and a wrinkled face, and a gaggle of Canadians from the far North. Each one of ’em stuck they dicks in Buck’s armpit and shot they wad on Buck’s back.
He ain’t mind one bit. There ain’t no benefit to being squeamish, after all, and if’n Buck could negotiate some exchanges with all them, he got plenty outta it.
It’s just an armpit, he told himself. Lotta them fellers was stinky, but so was Buck. Gooey got a skinny dick, shooting a thin wad out Buck’s armpit. He was followed up by the stubbiest-dicked Turk. Buck know for a fact that Muslims always try and stick it in, so he was ready for it when that Turk rammed his cummy dick onto Buck’s mouth. Buck ain’t open up, and he punch that Turk mid-orgasm in the buttcheek — he gotta reach around his portly ass to get him good.
From Jeb the Farmboy