Colin quickly shucked his clothing, leaving only his plaid boxers which were quickly tightening and, thread-by-thread, becoming a brilliant red. Using the wall behind him for balance, he gleefully watched as his body started to change.
Max and his lover looked on like a pair of proud fathers, each stroking the other's cock through their tight red Speedos.
Colin's feet expanded to size 15 monsters, followed by the infection moving up his legs leaving bulging muscles along the way. The pudge he had in his belly quickly gave way to perfectly sculpted abs and pecs. Arms were next, with new muscles pushing out in perfect form. His neck thickened slightly as his face became more angular and defined. All of his body hair receded as his torso and limbs lengthened to give him several more inches of height. His underwear completed its metamorphosis to a perfect red Speedo just in time to encase his new firm bubble butt. Finally, his now smooth cock and balls began to grow within their new nylon/lycra home with Colin moaning to the most incredible sensation he had ever felt. He could feel his balls begin to fill with never-ending infected cum.
As the transformation finished, Colin's now-brilliant emerald green eyes flicked open. He beckoned to his two Speedo Fag brothers with an unspoken lust. His rapidly diminishing brain only wanted three things - to work out, fuck other Speedo Men, and to spread the Speedo Fag infection as much as possible.