In fact, all the stroking and stimulation Coal was doing to attempt to remove his cock, only made it angrier, his balls heavy with juice and now hanging down to his knees, churned and began to send up more cum as if to answer Coal's commands.
Coal's huge cock and balls were tight and full with never-ending spunk. Frantically, he tried to pull his dick out of his mouth, but it was too hard, and he wasn't strong enough to force it out. His entire body began to feel tight and full, just like his cock and balls. A strange warmth spread within him as well, from his toes to his head. His cock was downright hot.
Power filled him. His body began to swell, as his muscles grew larger and harder, their enlargement driven by the demon-cum he was drinking. Distracted, he stopped trying to pull his cock out of his mouth, and raised his arms. Veins snaked across his skin, feeding rapidly-growing muscle. He flexed, and was rewarded by an impressive bicep. His entire body was becoming bloated with size and power. This turned Coal on. His cock screamed along, shooting even more cum down his gullet. The big tool was nestled between his thick pecs, and every twitch and flex only pleasured his cock more. Coal's body was bigger than that of the largest bodybuilders now, and it continued to grow.
In the corner, Xan was beating his own rod off furiously, unable to contain himself at the sight of his master's very thorough transformation.
With a forceful push from his mighty arms, Coal managed to force his huge cock from his mouth at last. Cum sprayed into the air, spreading across the ceiling, dripping down onto Coal. Coal ran his hands across his new body in wonderment, rubbing in the raining cum in the process. Xan came as well, whooping with pleasure in his raunchy little way. Coal, for his part, was no longer drinking his own cum. The once-inexhaustable supply slowed, and stopped at last. His balls shrunk down to baseball-sized, and his dick slowly deflated.
Coal lay back, and pondered what to do next. His cock and balls were completely impractical (if rather impressive, not to mention fun.) He loved his new muscles though. The sheer size of his new body was a major turn on. It might be hard to get into some small places now, but Cole thought he might be willing to take that risk, just to keep his new body.