Clay's hard penis was throbbing from the stimulation he'd felt watching Mario shrink as Adam's cum had drenched him. That, coupled with the tiny, sputtering man's motions against his sensitive glans, only made him more aroused. As the tiny, shrinking Mario wiped more and more of the thickening cum from his face and body against Clay's giant member, he heard the low, rumbling shudder of the newcomer's zipper being pulled up over him...
His tiny feet scrabbled for purchase against a pair of balls that were -when he initially encountered them- nearly half his own size. Each looked like they were three feet diameter spheres of huge, warm, sexual flesh ... and getting steadily larger!
He spit out more cum and wiped it free from his lips and face, still clinging to the underside of Clay's cock as the zipper closed and the giant man's fly pressed him neatly against the huge, "ten-foot-long" member. As the darkness closed around him -only dim light seeping through the threads of the denim fabric around him- he could see his own tiny penis shrinking steadily down tinier and tinier! He let out a tiny yelp and put his hand to it, pulling on it desperately as if to stop it from shrinking any further.
It was so sensitive and hard, he barely could hold himself back from cumming just from touching the tiny, "half-inch" shaft with its miniscule balls...
"I wish Adam's cum would make me bigger!" he shouted in his tiny, squeaking voice. "I wish Adam would come get me and jerk off on me, now!" Still getting smaller, Mario held on for dear life and watched as Clay's cock expanded past "twelve feet" long to "thirteen" ... then "fourteen" ... "fifteen"... He couldn't be much bigger than three inches tall now!
Outside, he could hear deep, booming rumbles that seemed to shake his shrinking world to it's core... Adam and Clay were talking...
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Adam smiled with a curious grin. "How's it feel?" he asked Clay, looking down as Clay re-fastened the button fly over the shrunken Mario.
The newcomer smiled and took a deep breath, half-closing his eyes. "Oh, gods... It feels ... it feels great!" He grinned up at the taller man and licked his lips slowly. He'd never been alone with a nude man before, but he'd always had certain ... fantasies. Slowly, he lowered his hand to press up against the shrinking man in his pants and began to rub him up and down against his cock. The wetness from Adam's cum that was all over Mario seeped through Clay's pants, giving him a tell-tale stain. "He's squirming so much..." he said with a grin. "Gods, it's so ... so ... hot!"
"You look like you're not used to having a man stroke you down there," replied Adam with a laugh. "That's Ok, though. Neither am I... Before this afternoon, I guess I'd never thought about my desires for another man..."
Clay stepped forward, his hands leaving the squirming Mario and -instead- slowly lifting the huge shaft up between them as he pressed his chest against Adam's. His heart was racing as he dared such a thing. "I ... I guess I have, but ... but I've never done anything about it," he admitted to the Physics major. "How'd he get so small, anyway?" he asked, grinning.
"Dunno; must've been a side-effect of one of his spells." Adam smiled and placed his hands around Clay's back, pulling him close and squeezing his giant, two-foot cock up between them. "But it seemed that he shrunk every time I came on him. Is he still Ok?"
Clay nodded, rubbing his crotch up against the titanic balls of the larger man, feeling Mario squirm in between. "He sure is... Smaller, though, I think..."
"I wonder what would happen if *you* came on him..."
Clay grinned. "He'd probably vanish," he said, licking his lips. "But, as far as I know, *I* don't have any spells on me. Care to give me a shot at that monster between us?"
Adam grinned. "Must be my lucky day... Only gay for an hour and already, I'm getting three blow-jobs..."
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Something was wrong.
Mario shouted out his wishes again and again, but he kept shrinking and there was no sign of Adam coming to the rescue! He could hear them booming and -with the sound insulation of Clay's pants- he could even make out the words fairly well.
"Clay! No!" he shouted. "Adam's cum will shrink anything it touches; not just me!" But it was of no use. Clay shifted his position and Mario could feel the world descending. The big man who'd trapped him against his cock was kneeling.
Why weren't his new wishes being honored? Looking down, he blanched as his teensy cock looked more like a tiny pimple on his groin; his balls no longer visible beyond two, tiny specks. The giant cock in front of him, was still gargantuan!
Wait... No, it wasn't. Well, it *was*, but it wasn't as gargantuan as it should be... In fact...
Mario gulped. The cum that had wiped off of his body onto Clay's shaft was starting to make it smaller. The bigger man's balls were still huge, but his giant shaft was slowly shrinking!
Outside, he heard Adam's now-familiar moaning as his tiny world was shaken. Barely an inch tall, now, the tiny Mario tried to get free ... if only he could climb down and get out of Clay's pants from the bottom.