I awoke with my son's breath panting against my face and the hard-on inside the front of his boxers grinding roughly into my similarly aroused cock. I realised he was still asleep and that during the night we must have snuggled up face-to-face in the hostel double bed. Our two large bulges had started rubbing against each other, growing steadily firmer through the material of his shorts and my briefs. Soon gentle nuzzles had given way to more deliberate jabs, until by now we were ramming our two full erections together, bucking our hips back and forth as we crotch-humped in our sleep.
I smiled at Jake's excitement and heard myself gasping from my own. The front of my generously-pouched white Calvins was struggling to contain the enormity of my driving manhood, and I could feel that my son's tighter-fitting shorts were being stretched to near-tearing by the frantic thrusting of his thick, solid rod.
I became aware that our bed was squeaking in time with the heaving of our bodies and so I opened my eyes to see if either of our companions had been awoken by the noise we were making. As I expected, Guy's son - who had probably slept little during the night - was peering over to watch us clinging onto each other, pounding our hips so frantically together under the cover of the bed sheets.
I smiled at him to show that I was happy for him to watch Jake and I start our day by vigorously frotting our erections together. Then I flung the bed sheets aside so that Simon could see the fronts of underpants stretched into great thickened rods thrusting in time as our two big cocks stimulated each other.
Simon was a similar age to Jake - just gone twenty-one - but he lacked my son's sexual confidence as well as his eagerness to experiment with pretty much anyone who was up for it, including his own dad!
Simon smirked sheepishly as if he knew what he was seeing was flagrantly taboo but wanted to show that he very much liked it nonetheless. I grinned back more broadly hoping to make the point that not only do I greatly enjoy such intimacy with my son but that, since his own brawny father was sleeping next to him in his bed, he might soon like to sample the pleasures of incest for himself.
Jake began to awake, his bleary eyes furrowing with confusion at first, until he quickly figured out what the two of us were doing. His gasping mouth formed a smile as he remembered we were in Barcelona, sharing a hostel room with his buddy and their two dads. Then his eyes narrowed with naughty amusement as he realised he was in the middle of a very rough and noisy frot with his own sweet papa, our two big upright hard-ons working furiously together as they bucked back and forth through the taut material of our undies.
"Fuck yeah!" Jake chortled and thrust his hips more roughly. Simon beamed across at me, wide-eyed, as he understood that our sex together wasn't something furtive or one-sided, but something that both Jake and I actively indulge in as an established father-son couple.
Then Simon got up from his bed and stood over ours, peering down at the two of us jabbing our tenting boners together and I saw that his own pyjama shorts were raised high from the long, thin pole he'd grown inside them.
Jake reached down and released his cock from his boxers. He tucked the waistband under his two enormous bollocks and then fumbled with my briefs to do the same to mine.
Now that our two huge manhoods were free from their confines, we drove them faster together, clinging onto each other by the hips.
I smiled up at Simon and panted, "This is so much better than just masturbating... it's so much more intense..."
Now aware of his old school friend standing behind him, Jake looked up at him and grinned, "Aw yeah... this is awesome, buddy... a bit of daddy-love is so fucking hot!"
"Do you guys...?" Simon tailed off, finding his breathing more shallow than he expected, before trying again, "Do you do this often?"
"All the fucking time, mate," my son lied - this was the first time we had properly frotted our cocks together. "Come on, dad, let's show him how we do it at home!"
We got up together, pulling our underpants down further, and then squatted face-to-face holding each other around the waists. We started driving our large erections together in long upward arcs so that the ribs and knots of Jake's veiny shaft grated against the smoother underside of mine. Our balls bobbed together, feeling big solid and hairy, and we were sweating and panting as we clung onto each other, urgently sweeping our cocks shaft-to-shaft.
"Fuck yeah!" Jake repeated a good deal more breathlessly. "Hard and fast, dad... really hard and fast!"
We sped up and thrust more roughly so that our hips were cracking together in hurried applause. The bed was screeching wildly - its metal frame complaining from our rowdy exertions - but I didn't care if we woke the whole hostel with our father-son frotting. All that mattered was my son's cock pummelling against my own, their two slits now seeping copiously and dribbling thick goo down the length of our shafts.
This is what I call true gay lovemaking. Anal sex is hugely enjoyable and I don't deny I'm an ardent fan, but penile frottage is exclusive to homosexual couplings and I was thrilled to be finally experiencing its masculine energy with my son.
We were making love as two men using our two very large cocks and I have to admit that the sensation was divine.
"Come on let's nut together!" Jake breathed hotly into my face. "See if we can time it just right!"
We grabbed onto each other harder, clapping our hips wildly together and slamming our huge hard phalluses upwards with all the force we could muster. Jake's thick, veiny shaft grated against my bulbous cock head, making me pant and whimper at the exquisite friction of its coarse, knotted underside.
My organ felt bigger and more swollen than it ever does when it's up inside my son's bum. Frotting has always stimulated it more intensely, making it fill and harden into a towering rod of excitement, visibly throbbing as it thrust up and down and pouring out precum like a slow stream of piss.
"I'm getting close," Jake gasped. "My spunk's gonna hit the fucking ceiling!"
"You guys look... I can't even describe how amazing you look," Simon muttered, still standing next to our bed with his own hard-on tenting his pyjama shorts out high. "It should be creepy but... Jesus! It's just so totally hot!"
We both leaned backwards slightly to flaunt our two big cocks to our eager voyeur. We jabbed them frantically upwards, showing off their huge bloated heads looking polished and purple, and Simon gasped as he ogled them, admiring the beauty of father-son cock-love.
"Get yours out!" Jake commanded him. "Show us that foot-long dick of yours!"
Simon grinned and pulled the waistband of his shorts up and over his erection, releasing it to arch thinly upwards with the red head of it exposed and shaped like a long mushroom cap.
"Aw yeah!" Jake bellowed. "That has to be the most awesome fucking cock!"
"It's gorgeous!" I grunted, marvelling equally at its incredible length and slimness of girth. "Looks as good as it tastes!"
Jake's cock let rip with a blasting gusher of cum at the memory of seeing me sucking his friend's skinny cock in his bedroom at home. It shot upwards between us, making a high arc of white goo above our faces, before splashing down on us both and covering our shoulders and chests.
The strong smell of my son's semen aroused me as it always does when he climaxes first, and within seconds my own big shiny bell-head was flinging out its own sticky load, showering us further with great pearls of my seed.
We grabbed each other closely again, humping our cocks more roughly together and laughing at how we were becoming smeared with each other's acrid-smelling juice. Our two wide slits were still expelling rope after rope of jizz and it was making our chests squelch together and our pubes sopping wet.
