"You know Ty," said Mark, closing his book. "I wanna thank you again for this awsome body. I feel fucking great."
"No problem. Like I said, I love to watch my friends get big." Ty smirked and Mark gained another ten pounds. He felt a euphoria as his chest flinched outward and a small rip could be heard from his black briefs.
"Wow, I don't think you could possibly love it as much as I do," Mark raised a massive arm and curled it, flexing his rock solid bicep for Ty to admire. "But, there was another reason I was looking at that poster," said Mark, gesturing with the same beefy arm at the poster that now displayed his previous form. "Ty, I'm gay. And I feel so hot right now that its really difficult for me not to get turned on by my new body."
"You're not the only one," replied Ty, licking his lips. He leaned back in his chair and spread his legs just enough to proudly display his own impressive bulge. When he aged himself to twenty years Ty gave himself a decent nine inch cock, which was now rock-solid and straining his jeans.
"Wow you look hot, and big," exclaimed the hulking Mark, who had obviously not examined himself that thoroughly. "Ty one of the reasons I wanted to be your friend is because you're so hot. I've always thought you were one of the sexiest guys on campus and up 'til now I've never thought I'd be attractive enough for you. But now..." Mark flexed his huge chest, his swollen pectorals bunching up against his chin. Then he stood up to his full 7' height and hit an amazing double bicpe pose, showing off his massive 25 inch guns. "I think I'm big enough for anyone."
'Not quite,' thought Ty. He glanced down at Mark's briefs. The giant had managed, somewhat comically, to remove his jeans from his beefy legs and all that remained was the tortured underwear. Mark was getting aroused by his posing and Ty could clearly see his large cock swelling. However, despite the fact it was already tearing, Ty was angry at the persistance of this last article of clothing. He decided not to wait.
Mark was still flexing when he began growing again, incredibly fast. His arms swelled with muscle, his skin stretched thin like a balloon being filled with wet cement. His shoulders and back packed on pounds of muscle, growing so huge that his traps completely overtook his neck. The breadth of his massive shoulders widened to six feet as his arms and legs stretched adding height to his staggeringly large frame. His pecs quickly doubled in size and his cut abs were now the size of a man's fist. His thick quadriceps were growing from maples to redwoods as the teardrop shaped groove deepened. His musceld ass grew large and so firm it would shatter a wooden bat if struck.
This was what Ty had been waiting for. As his taught butt swelled, the bulgin briefs snapped at the waistband and ripped along Mark's gigantic thighs. The shreds fell away, revealing his thick monster. Mark groaned in pleasure as his balls reached the size of oranges and his cock lenthened and hardened. As the growth slowed Mark was just under 500 pounds of sheer hulking muscle. He stood at a massive eight and a half feet tall, causing him to bend slightly under the eight foot roof of Ty's small dorm room.
Mark's stiff cock reached a full twenty inches, the shaft pulsing with veins from the forest of hair at the base to the fat mushroom head. "Fuuuuuck, yeeeaaah," Mark moaned, opening his eyes.
Ty could take no more and began to unbutton his pants. "Let me help," said the giant bodybuilder in a deep guttural voice. Mark, now out of his pleasure coma, reached over and slipped a thick thumb into the waistband on either side of Ty, then ripped his pants in two. The button and zipper handle flew and bounced harmlessly off his beastly pecs and abs. Mark smirked as the individual pantlegs fell to the floor, revealing Ty's nine inch boner.
"I definitely think I'm big enough now," said the hulking Mark in a basso tone. He got down on his knees, thrust his hips and swung his giant meat stick, smacking Ty's own comparitively tiny dick.
Ty was now leaking precum everywhere as he pulled off his shirt, revealing a modest swimmers-build. Mark, still insanely attracted to the twenty year old model, reached out and completely encompassed Ty's cock in one massive paw. "Fuck Ty. I'm so horny right now." This was obvious from his enormous shaft reaching straight up toward his shelf-like pecs.
Ty watched through gasps of pleasure as the incredibly muscled arm holding his cock began stroking and squeezing. He saw the thick biceps and triceps alternatively flex as Mark's pecs bulged bigger than Ty's head. Ty reached out and squeezed a nipple that was bigger than his nose. Mark growled with euphoria. He moved his hand down to the beastly cock and began stroking.
This caused the hulked out bodybuilder to stroke faster and Ty shot a large load that covered Mark's immense nuts. Mark looked down and said, "Too bad, cause we're not done yet."
"No problem," said Ty as he wished for more stamina. His balls inflated and his cock was once again standing firm.
"Good, now come here," the giant muscle god commanded. Instead of letting Ty comply he reached out with his swollen arms and simply lifted the twenty year old off his feet. He rotated Ty around and slipped him between his heavily built chest and his pulsing cockhead so that Ty would have been riding Mark's enormous manhood if the muscle giant stood up. As it was his feet just barely touched the ground and the massive shaft was actually supporting some of his weigth. Feeling his cock being pressed against by Mark's fat monster caused Ty to shiver. He was forced to bend forward by the massive size of the huge man's pecs. Looking down, he saw that even the length of dick extending out from under him was still slightly longer, and definitely thicker.
Mark reached around Ty with his bulging arms and grasped the mismatched pair of cocks with both hands then began pumping them for all they were worth. The muscle god started grunting sexually and the noise pulsed through Ty from Mark's hard body pressed against his back. Turning his head, Ty could see that Mark's pecs were so large, that his nipples were several inches away on either side of Ty. He wrapped his smaller arms around Mark's huge biceps and felt them flex with every stroke of their cocks.
Mark began grunting louder as they both neared climax. Ty felt the giant man's pecs and cut abs clench and flex against his back while a surge went through the beastly shaft between his legs. Ty's moans of pleasure were drowned out by Mark's sudden deep roar that shook the windows and his load was immediatly lost in the eruption of cum spewing from below. Mark closed his eyes and leaned back, lifting Ty off the floor by the sheer strength of his fountaining cock. He released his shaft and flexed both insanely ripped arms which swelled to the size of basketballs. "FUCK YEAH," Mark roared, feeling the power coarsing through him. Close to a gallon struck the ceiling as that much more sprayed down on the sexually charged muscle god and his boy toy.
In his state of pleasure Ty accidentally wished...