I wrote this out of horniness, but then I became interested in the logic of the situation, so the rest of the story after the jerk off material is world-building and the setup for a potential sequel.
In a distant village, a festival is about to begin. About a dozen men, who have just assembled in a clearing at the outskirts of the village, had just gotten married, and they were about to be anointed by their fathers. The tradition served both as an acknowledgement of their fully realized manhood, which had now been affirmed by a marital bond, as well as to reinforce the relationship these sons have with their father, thus tying them back to the family that they had grown up in. Essentially, the holiday was both a symbolic farewell to the people these men once shared a roof with and an initiation into their new life with their spouse. To do so, the sons will have to learn from their paternal figure exactly how they are meant to behave as patriarch of their new family and husband to their wife. This instructive experience will require a hands-on demonstration, where the fathers will pass on their knowledge and paternal status, and the sons shall know the pleasure they will soon bestow on their wives. For these young men, the prospect was certainly an enticing one that they had looked forward to ever since maturing into adults all those years ago. One of them adjusted his ceremonial loincloth, trying his best to hide his excited erection. The other toned lads didn't bother at all, their rigid cocks all straining against the cloth, leaking small streams of pre-cum down their sturdy legs.
Suddenly, the drums signalling the arrival of the fathers began to sound. The sons all stood at attention, their stoic expressions betrayed by their erect dicks. Finally, the fathers came out from the surrounding crowd, each of them dressed in an elaborate ceremonial robe. As the village shaman prepared the ritual drink, the older men each made their way to their sons. Some of them exchanged the vilest obscenities in excited anticipation of the upcoming ritual, the son and the father each unabashedly reveling in their lust for one another. A few of the other men took a more solemn and orthodox approach, reminding their sons of the knowledge and experience they should draw from this occasion. Neglect to learn, and they will find themselves ill-equipped to please their wives and honor their marriage. The sons, likewise, vowed to their fathers that they will strive to be most receptive students, and that they shall imprint upon themselves the techniques and sensations that their fathers will impart to them. The young man who earlier had tried to hide his stiff dick decided that he would go the extra mile, passionately declaring to his father that he will not only learn much from him as a son and new husband should, but that he will also take and know his cock as a lover would. The dad of that particular man gulped, fearing that by the end of the ritual, he will no longer know this man as just his son.
With a dramatic end to the beating drums, the shaman presented the fathers with a bowl containing the drink that would begin the anointing. Each of these large muscular men took a long deep gulp from the bowl of thick, creamy fluid before they handed it off to the next one of their peers in line. Finally, all of them had partaken in the drink, and the changes that it brought were immediately obvious. The men's enormous muscles bulged even more so than usual, and they started breathing rapidly as something down between their legs grew so large that even their robes couldn't hide them anymore. The shaman then gave a loud triumphant shout, signalling the anointing to begin!
The fathers tore off their robes in an instant, revealing their stark naked bodies, bulky muscles, and, of course, the engorged cocks that now stood at attention between their legs. The sons all ripped off their loincloth too, now being fully bare for their fathers to see. The sight of each of their son's dicks seemed to snap something within each of the men's heads.
With a vicious, guttural roar, they all leapt forward, pouncing on their sons and forcing them to the floor. The fathers pressed themselves against the their son's faces, pushing their leaking cocks as far into their mouths as possible. The young men didn't seem to mind one bit, and even the previously concerned fathers were maddened with lust and enjoying the savage fucking they were giving their own sons. Soon, they all, without warning, yanked their rods from the mouths of these men, and each of them subsequently shoved their cock deep into his son's ass.
The fathers' bodies started trembling as they kept thrusting their mammoth cocks deep into their sons, their hips pumping back and forth wildly as they fucked their sons to their limits. Then, they all let out a deep bellow of pleasure as they came inside their sons. The father of that man, the one who had tried to hide his erection, nearly passed out from the huge orgasm he had, so much so that his cock slipped out of his son's ass and sprayed some of its load onto the man, who gasped and groaned in euphoric bliss. And as the fathers withdrew their cocks from their sons' holes, each of them proclaimed that their sons would all be "properly blessed". The shaman, nodding in agreement, declared that the fathers must now anoint their sons, thus passing on their paternal title to the next generation.
The sons obeyed eagerly, quickly falling to their knees in front of their fathers, who each then offered their slick cocks, still covered in the load they spilled inside their sons' asses. Each son, with perverse enthusiasm, kissed the head of their father's cock before using their tongue to begin cleaning away all the semen. Finally, with all of the cocks cleaned to perfection, the fathers ordered their sons to assume the positions in which their marriage shall be affirmed in the eyes of their family.
The sons shouted with joy as they each prepared themselves. Some decided to simply keep kneeling as they stuck out their tongue and opened their mouth wide, readying themselves for a facial. Others got on their hands and knees, wiggling their asses up at their dads as they feverishly jerked their dicks. The young man who had tried to hide his rod had a different idea, as he leapt up into his father's arms to be flipped upside down. Soon, his dad, who had a secure grip on his son's hips, lifted his cock up to his mouth and began sucking it. The son, on the other hand, now had his face at the level of his father's dick, which he proceeded to suck on, drool all over, and lick as he greedily coated his dad's dick with his drool.
Then suddenly, as if both the fathers and sons were connected by a single mind, they all screamed together in a orgasmic chorus as they shot their spunk out of their cock shafts in multiple, strong spurts. The seeds of the fathers coated their sons, the paternal load now officially passed on to the next generation of husbands and to-be-fathers. To mark this passing of the torch, all twelve sons got on their knees as one and kissed the slit of their dads' cocks one more time. They then rose to their feet, now officially new patriarchs within their village. The fathers and sons embraced one another as the village men in attendance cheered in jubilation, welcoming these men into their folds. The ritual was now over, and the celebration afterwards would now commence.
The fathers still locked in embrace with their sons, who still labor under the effects of the drink, began kissing their man with wild abandon. The sons, who themselves were not even close to being sated, met the lust of their dads with full force, lashing their tongues together while each of them reached for the other's already hardened dicks. The fathers', having already waited for far too long, threw their sons on the floor once again, though this time, the men who could only watch from the sides during the ritual now walked forward, stripping their clothes on the way, until they were fully nude, erect, and descending upon the submissive sons with maddening lust.
The shaman watched with solemn eyes as the son who had been embarrassed of his own erection was now pleasing a man with his mouth and hand, the long, thick cock being pumped into and out of that exceedingly tight mouth. At the same time, another man, who the son was straddling, shoved his dick right into his ass, while his father did the same thing with his own gargantuan cock. The son screamed in glee and euphoria as his own penis throbbed and spasmed, being unable to contain his premature ejaculation as the two men inside his ass began to move in sync.
The son began pumping the man's dick with so much vigor that he, having not anticipated this much pleasure being given to him so quickly, bellowed into the air as he clutched the back of the son's head, his own dick now a solid, pulsing mass of spunk. The increased tightness of the son's ass, helped no less by the fact that there were two massive cocks shoved inside, began working its magic, causing both the man and the father to tremble with bliss. The two of them, desperate not to cum so quickly, could barely move given the pressure that had already arisen inside their balls.
The son, having grown impatient of the two muscular men inside of him, wiggled his ass to entice them, knowing that his own dick was about to shoot his load at any moment. He was also more than a little eager to show his father just how capable he was now, being able to please not just him but two other men simultaneously. Trying to stop himself from screaming as he came, the son quickly bent forward and started kissing the man he was riding, causing the semen inside his mouth to mingle with the other's. The sensation of the kiss, particularly the soft tongue that the man now felt against his own, was spell-bounding, and any amount of resistance that he had against his oncoming load that he had managed to conjure up instantly collapsed. The son's ass also proved too stimulating for his father, who had gotten a perfect view of his cock as his son lightly bounced his ass on and off it.