"Whoa! I didn't know you guys were playing piggy-backs in here!" Jake called out when he saw his dad on all-fours with Guy squatting behind him.
The hairy broad-chested plumber chortled across at his fuck-buddy's son. He always enjoyed a bit of banter with Jake.
"Reckon you could take giving me a piggy-back, Jake?" he asked my cousin, grabbing my Uncle Rob more tightly around his belly and resuming slamming his hips back and forth against his arse.
Jake laughed back. "Whatever you got, mate, you can bet I can take it!"
Guy smirked at his answer and got on with enjoying his butt-fuck. Jake and I both peered over at his thick veiny cock steadily sliding in and out of Uncle Rob's tautly-stretched bunghole. His technique was unrushed and deliberate as if he was enjoying savouring the pleasure of having my uncle's well-practised rectum squeezing his steely hard girth.
"I've gotta admit, though... you guys look totally hot together!" Jake gushed at the pair of them. "However sexy you both might look getting cosy with women, you look a hundred times better doing each other!"
Guy just laughed at the observation but I could see that Uncle Rob was really chuffed by receiving a rare compliment from his son. He beamed a broad gratified smile as he continued to face forwards and it stayed on his lips long after Guy's amusement had faded.
Jake sat down on one side of his dad's double bed so I did the same on the opposite side. We both seemed mesmerised by Guy's thick meat sweeping back and forth between Uncle Rob's two round cheeks and I found it difficult to take my eyes away from its relentless, almost hypnotic rhythm. But there was so much else in their sex that I didn't want to miss, that I had to force myself to look beyond just the penetration and take in the other details of these two big men pleasuring each other right in front of me.
For a start, there was Uncle Rob's own impressive manhood, throbbing forwards and dribbling streams of goo down onto the doona. He kept pushing his bum back to meet Guy's slow steady thrusts, his arse-cheeks gaping open and making the thick bush of hair sprout outwards from his crack. And underneath that were both men's huge over-sized bollocks, dangling down heavy and low and repeatedly slapping together as they heaved their big solid bodies against each other.
I smiled at Jake, seeing how he too was captivated the sight of his dad allowing another man to use his butt for sex. Jake saw me smiling at him and grinned back over at me. He said, "If you saw this pair on the street... just chatting together like a couple of mates... you'd never guess in a million years that the two of them were shagging each other's arses!"
I chuckled and nodded before telling him, "Guy said earlier that he started having sex with other dudes when he worked on an oilrig."
"It was a necessity, mate," Guy nodded towards us. "All us men cooped up together in those cramped little bunkrooms!"
Jake grinned and said, "Oh my God, you make it sound as horny as fuck!" Then in a silly voice he said to his father, "Daddy, when I'm all growed up I want to work on an oilrig like Mr Leeson!"
Uncle Rob quipped back, "Well, when you're putting in for an application form, get one for me too!"
I chuckled before asking Guy, "So, the way you are with Uncle Rob right now, is how you had sex with other men on the rig?"
"No fuckin' way!" Guy laughed. "It was nothin' like this!"
"How was it, then?" I persisted, interested to hear how men packed together in close confinement would couple up together when they were feeling horny.
"You didn't pace yourself the way I am now... you don't give yourself time to enjoy the feeling," he explained with his cock still sliding smoothly and slowly in and out of Uncle Rob's raised-up butt. "It wasn't anything like shaggin' someone for the pleasure of it... it was much faster... more urgent..."
"Aw yeah!" Jake laughed. "All the oiled up riggers going at each other's arses like buck rabbits!"
"It wasn't like that either!" Guy grinned at him. "The bunkroom wasn't like some gay porn film!"
"So how was it?" I asked again, genuinely trying to picture how men might have sex together in cramped communal quarters.
"If you were gonna do it, you did it after lights-out," Guy said. "Not that it was dark, mind you, because there were always emergency lights left on. But if you were gonna get your oats, you snuck over to the other bloke's bunk when it was dim and quiet and the other men were trying to get to sleep."
Guy bent lower so that his chest was pressed against Uncle Rob's back and pushed his arms underneath him to hold him tight by the shoulders.
"Most blokes did it like this," he explained. "You got on top of your buddy's back and sort of squatted together, both facing forwards. You didn't have much space in the bunk-bed so you had to hunch down low together and one of you put your knees between the other's. Not exactly the most romantic of positions..."
"What did the other guys in the room do when two men got together for sex?" Jake asked. "Those who were still awake, I mean...?"
"Blokes generally fell into two camps on that one. Either they'd ignore what the two of you were doing and turn away to sleep, or they'd ogle over at you and start wankin' themselves off. There wasn't much middle ground between those two reactions!"
"Which camp did you fall into?" I asked.
"The second," Guy grinned, still crouched over my uncle and holding onto him like a dog mounting a bitch. "I got to like the smell of two blokes playin' pokey... which was what we called it on my rig. A lot of guys complained how bum sex after lights-out would stink out the bunkroom but once I'd done it a few times myself and got... you know... a bit of a taste for it... the smell of other fellas butt-bangin' got to be a turn-on."
"So what happened after the two of you had got into the romantic double-squat position?" Jake asked with a smirk.
"I smeared some spit on my cock and worked it into the bloke's hairy gash, then I fucked him up the arse dead fast to make myself nut off as quickly as I could."
In demonstration, he grabbed my Uncle Rob tight and firm by the shoulders and started shagging his bum really quickly, making loud clapping sounds as hips slapped hard against my uncle's buttocks. Uncle Rob's face blushed as red as his arse-cheeks went. It looked like he was seriously enjoying being treated like one of Guy's oilrig bunkmates.
Soon Guy stopped thrusting and he grinned over at us. "Usually I was so fuckin' desperate that I'd last about thirty seconds. Then it would be over and I could pull out, wipe off and go back to my own bunk to sleep."
"Oh... so you didn't swap around so you could return the favour?" I said with some surprise.
"No fuckin' way, mate!" Guy chortled at my naivety. "It cost a couple of packets of fags for some fella to let you seed him up the arse, so it sure as hell wasn't a two-way deal!"
Guy got back into the position he seemed to prefer with Uncle Rob, kneeling upright behind him with his hands on his hips, sliding his dick slowly and smoothly in and out of the thickly forested butt-crack.
