Carl quickly got to work, setting files and making modifications with a sinister grin on his face. He had just finished making the finishing touches when the door opened, and Jeff and his new twin both entered, both hot and sweaty from their jog. Carl span around on the chair to face them as Jeff blinked in surprise. The sock twin smiled and waved.
"Oh, hi Carl. Here to cum on me again?"
Jeff turned to his twin, shocked. He did not have time to ask what he meant by that, however, because he was distracted by the changes he had noticed in his hand. Raising it, he watched in shock as his fingertips began to turn white, the color slowly spreading down to his palm, then his wrist. Twisting it he saw that his fingernails had vanished, and his skin was rough, white and striated with lines. He reached over and touched it with his other hand, and it felt like...cotton.
Carl was grinning wider at Jeff's surprise, and stroked his crotch a little.
"Carl? What's...happening?"
The cotton texture had spread to Jeff's other hand where he had touched it, and as he watched, his fingers pushed together, fusing into a mitten-like lump. Tugging off his shirt, he saw that his body hair had completely vanished, and the texture had quickly spread up to his shoulders and was slowly crawling across his chest and back.
The twin seemed less surprised by this, and only stretched and smiled as he pulled off his shoes and socks, wriggling his bare feet as he saw his toes turn white and slowly fuse the same way Jeff's fingers had. He pulled his shirt up over his head and wriggled down his shorts and underwear, lying down naked and grabbing the socks he was just wearing, sniffing and nuzzling them as the change progressed. The twin still partially had the mindset of a dirty sock, and so was quite happy about the prospect of turning back.
Jeff was not so happy, as his mouth began to feel dry and taste cottony. The taste was mixed with a slightly salty, acrid flavor, as he began to smell the scent of dirty sweat and old cum coming from somewhere. It was a few moments before he realized it was oozing from his own body. He tried to speak, but his mouth had smoothed over, becoming a patch of grey cotton.
An aching pain in his groin made him wince, and he pushed down his pants and underwear to see that his cock, embarrassingly erect despite himself, was rapidly shrinking. His balls were also aching as they pulled up against his groin, until with a bizarre feeling of release, both withdrew into him, leaving his crotch smooth and flat and cotton-textured.
The changes began to speed up as he felt his legs forcing together, his feet sliding free of his shoes and socks of their own accord as they turned flat and weak. His arms were pushed against his sides, merging into his torso as they melted away. His legs began to squash and meld together, his feet opening up into the hollow opening of a sock as a deep, empty hollowness pushed up through his body.
Twisting over to see his twin, he saw that the other Jeff's change was more advanced, his body already completely covered in cotton texture. His facial features were like the cotton was stretched tightly over a face, but they soon smoothed out as his body deflated and flattened. Jeff tried to wriggle and escape, but his control over his body was becoming weaker and weaker as the itchy, strange feeling of his skin becoming cotton covered his entire body and spread up to his head.
For a moment, his vision was obscured as if a sock had been pulled over his head, as cotton overtook his face. This was soon replaced by normal vision as Jeff's features smoothed over, and his body slowly deflated and sank to the ground. He suddenly felt terribly empty and hollow, desperate to be filled and warm.
With a slow shudder, both the human-sized socks on the ground shrank and compressed until all that was lying in front of Carl were two normal-looking dirty socks.