Ryan paused, feeling the tightness in his shirt. He looked puzzled, but the look of happy gratitude on Guy's face brought a smile to Ryan's lips. Ryan's grin got even wider, as he saw the bobbing bulge pushing up against the wreckage of Guy's underwear, a thick cockhead under the fabric, pushing up against the big man's impressive musclegut.
Ryan stepped forward, his own cock throbbing in his shorts. He reached out, putting his hands on Guy's huge, jutting pecs. Caressing the bloated slabs of hard muscle, and teasing the thick, fleshy nips. Guy's big head snapped back, and he let out a low groan, his thick neck flaring, traps hulking to either side.
"J- just call the place..." Guy protested, but his deep voice was weak, his performance unconvincing.
Ryan leaned in, and ran his tongue over the impressive curvature of one of Guy's huge pecs, making the big man shiver with pleasure, new groans coming from his thick throat. When Ryan moved on to suckling on one of Guy's big nips, the big man let out a howl of pleasure.
Ryan was in heaven, tasting Guy's manly, slightly sweaty body, getting his mouth on the big man's thick nip. He could feel his shirt and shorts getting tighter on his growing body, but it only turned him on more. He moved over to Guy's other pec, lavishing attention on it before moving on to work his magic on the other big nip. Guy's whole body was quivering with pleasure, and his huge chest was rising and falling, as he drew in deep, shuddering breaths.
"F- fuck..." Guy managed to moan, his body on fire with pleasure.
Ryan began to move down to Guy's proud musclegut, running his hungry tongue over the thick abdominal bricks that protruded. His hands went back up to twist both of Guy's nips at once, making the huge man howl. Ryan could feel his shirt split slowly off of his torso, unable to contain his growing body any longer. His tongue kept moving south, his hands following, taking in Guy's big hard gut and sweeping hulking lats. Ryan slowly went to his knees, to better access the big man's lower body.
At last, Ryan came to Guy's hard, throbbing cock. He brought his hands down, and pulled the ragged fabric of Guy's underwear away, revealing the thick head of Guy's cock. Below, big round balls were pushed against the shaft by the massive girth of his huge thighs. Ryan pushed his face in, his nose nuzzling the big flared head while his tongue attacked Guy's hard shaft.
"Oh fuck...." came the big man's comment, his voice deep and ragged.
"Indeed..." Ryan replied with a grin, as he pulled on the big dick, and then engulfed the flared head with his hungry mouth. As he sucked, Guy roared in pleasure, his big body shaking a bit, as he pushed forward, sending more of the shaft into Ryan's mouth. Ryan grabbed onto Guy's big glutes, holding the massive balls of muscle tightly, as the huge man started pumping his mouth. Ryan sucked as hard as he could, and with every suck, his body swelled, his muscles seeming to bloat with powerful muscle. And with every suck, Guy shrank just as much, his oversize muscles losing some of their freakish mass.
Ryan's shorts slowly tore, splitting along the seams as his legs swelled larger and larger, quads and hamstrings and hips gaining size and development. At the same time, he was better able to grab Guy's shrinking but still substantial glutes. Ryan sucked harder, and the muscle came faster, packing onto his own body as it left Guy's. Guy, for his part, was unable to do anything but enjoy the whole process, growling in pleasure as Ryan sucked him off. He was slamming his dick into Ryan's hungry mouth, his mobility finally returned. He was still a huge mountain of a man, but no longer bloated to the point of immobility. But he was quickly diminishing, his muscles being transferred to his once quite regular friend Ryan.
Ryan was lost in the sensations that swept his body. Although every bit of his attention was focused on Guy's delicious cock, he couldn't ignore the magnificent feelings that were sweeping through him. As his body filled with muscle, getting bigger and stronger by the minute. He could feel his underwear getting tight, trying to contain his big legs, his powerful glutes, his hard cock. All for naught.
Guy looked down, his attention drawn by the sound of Ryan's underwear ripping from his body. The sight that met his eyes was amazing. Ryan was a hulking musclefreak now, getting bigger by the second. He was bigger than Guy now, although not as big as Guy had been. Guy was slightly disturbed by this reversal, but turned on at the same time. He let out a low growl, feeling ready to shoot.
Ryan felt it as well, and sucked hard. He was rewarded when Guy's cock shuddered and then exploded in his mouth, a large load of hot thick cum filling his mouth and sliding down his throat. Ryan drank it eagerly, his big throat pulling every last drop from Guy's cock and balls. When he was finally finished he stood up.
Guy gasped, as he took in the new Ryan. His own body had shrunk to what he estimated was a respectable 300 pounds. Still big and muscular, but not immobile like before. But Ryan was positively bloated with muscle - still not immobile, but already finding his movement a big restricted by the big sacs of power. Guy estimated his friend must be 450 pounds, maybe even a bit more.