It was a struggle for Paul to sit up. His legs were covered by huge sheets of skin that wrapped up enormous testicles, each one the size of a small television. And his penis had swollen to truly stupendous dimensions. Soft, he levered it onto his chest with both arms and found that it came up to his chin. Looking around the room, he gauged that his body couldn't be more than a foot tall, but his genitals hadn't dwindled a bit.
"Mmmm..." Paul said as he hugged his dick against his furry chest, squishing its softness with his muscular arms. He started kissing and licking its floppy tip again, still grateful for the most incredible orgasm of his life -- and honestly unable to move with these bulbous appendages attached to his tiny body. Paul's sex sprang to life with very little prompting. He licked it as it grew, up to his face, and then stretched even higher. Soon the tip of his own boner stood well above his head, almost out of reach of his hands.
Once it was fully hard, Paul noticed that it wasn't taking any stimulation from him to stay hard, and he relaxed with a sigh, wrapping his shaft up in two manly arms. That was when Paul felt it slip for the first time. At first, Paul thought it was his embrace that had slipped, but then it happened again. It was a strange sensation. Like a little zap of electricity that started at the tip of his penis, far above his head and then ran down the shaft into his balls. Then his whole body buzzed a in response for a moment, and the sensation was gone. As a result, he discovered his arms had slipped on the shaft of his cock somewhat, and his dick seemed even harder and hornier than before.
Looking around, Paul saw with a grin that he was starting to grow back. It looked like growing up was going to be as much fun as shrinking down had been. He layed on his back, his incredible throbbing manhood stretched out against his hairy front, and waited as the next jolts came.
It was the oddest thing, as Paul felt the contractions come faster and faster. He knew his body was growing, but it really did feel like he was still shrinking somehow. One thing he was grateful for was the fact that with each wave his sex was stimulated all the more. He didn't really believe there was anything he could have done to stimulate his own dick at its once-gigantic size. With each spasm now his cock contracted more, his balls drew themselves smaller towards his crotch.
Paul was finally able to sit up as his dick shrunk itself down below his shoulders again. It was vibrating now, spending about an equal time shrinking and not. Paul was able to grab it now with both hands and add his own assistance to his building orgasm.
It was just on the cusp of his orgasm, both hands working his mammoth dick, that he realized something wasn't right. His penis was shrinking much too quickly. It was not staying the same size as he grew back. Instead, it was on its own trip to the seriously-small.
Just as Paul fully realized this and grabbed his erection with both hands, he started shooting. Staggering to his feet as his balls churned, he felt them contracting sharply with each shot too. The orgasm seemed to just speed the whole process. His head and shoulders shot up quickly as his frame regained its inches. His balls felt lighter and lighter as the evaporated in his tightening sack, and his dick shrank in half as it telescoped in towards his hairy crotch even though he was holding it with both hands.
"Oh, stop, stop," Paul moaned, but he didn't really mean it. Of course he wanted his big dick and balls, but this orgasm was as strong as the other one or maybe even stronger and he didn't want it to stop. "Uuuh," Paul was gasping with each contraction of his orgasm now, as he was pushed to higher and higher levels of orgasmic bliss.
Paul realized he was lying on his bed as his dick finally receeded out of his fist. He didn't know how he had gotten there, but it was sure a comfortable place to drift off. For the second time in less than 30 minutes, he lost his hold consciousness, adrift in a sea of pleasure.
When Paul awoke, he found himself lying on his bed, but on his back now. Instinctively he clutched at his crotch, and was relieved to find that everything felt right in the world again. Groaning gratefully, he felt both exhillarated and exhausted. He looked at the clock. It was definitely time to get some shut eye.