Derek doesn't wait long. Within a few seconds, he starts to feel his dick starting to get warm. Looking down, he realizes that he left his balls out of the sock, so he quickly stuffs them inside too. Once they're in, his whole body starts to feel really good.
Staggering over to the toilet, Derek sits down as he feels his 7 incher stiffening on its own. It's like someone is deep-throating his whole dick while at the same time giving his balls a gentle massage -- licking, sucking, tickling them over every inch.
Derek wraps a fist around his hard cock, and notices how it doesn't seem to be filling up the sock the way he expected. There is a lot of extra sock bunched up around his manhood, and his boner doesn't stick out as deep into the sock as he thought it would.
The thoughts barely register as he feels his orgasm -- his fourth today -- building up. Putting his free hand between his legs, Derek feels his balls pulled up against his body, tight, firm, small. He tickles them gently through the sock, and they start unloading their contents through his dick.
The orgasm is so strong, Derek has to close his eyes as squirt after squirt of pleasure wracks his entire body. He feels the sock moving along his dick with each spasm, and that just stimulates him all the more.
After an unknown amount of time, the pulsating wave of pleasure slows down and eventually stops. Derek opens his eyes with a heavy sigh. With a tug, he drops the soaked sock to the floor, and unrolls some toilet paper to wipe himself up.
Looking down at his soft rod and spent rocks, Derek notices something is wrong immediately. Everything is way too small! Lifting up his dick with one hand to wipe it off, it is less than half the size it normally is when soft. And his balls have been shrunk from small eggs to large marbles!
Derek tries to not freak out as he looks at his shrunken genitals, but it is not easy to keep his cool. The sock is a mess too, but he's in no mood to deal with it. Derek wraps the sock up in some paper towels and resolves to find the guys who left it. It's sure to be a humiliating scene, but there must be a way they can help.