"Good thinking Genie... I wish I was at home lifting my weights," Davis said, after his wish had been helpfully improved by the genie.
A moment later they were back in Davis' house, in his basement gym. Although he had a full membership to a commercial gym, he kept his old gear in the basement for impromptu workouts--his obsession with his own body demanded it. Davis was lying on a weight bench, dumbbells in hand. He immediately began to lift, pumping out rep after rep, putting his muscular body through its paces. Between sets he took off all his clothes except the jockstrap.
Off to the side, the genie watched with interest as Davis exercised. The shy, chubby master he had initially met had been improved several times over. He was now a big-dicked stud who loved to show off his body. The genie had to admit, Davis was turning out better than expected.
After an hour of heavy lifting, Davis finished up his workout. He staggered away from the weights, his body tired. He'd be sore later, he knew, but right then he felt drained, but good at the same time. Very good, in fact--the orange pouch of his jock bulged due to his half-aroused state. He ambled over to the large mirrors set up on two walls in one corner, and flexed several times, admiring his pumped muscles from several angles, his cock bulge slowly throbbing in approval.
"Did you have a good workout, Master?" the genie asked, stepping up beside Davis. The mortal nodded affirmatively, still staring in the mirror. Yet as he looked at his sweaty body, his eyes wandered to the genie's reflection as well. The magical being was muscled, of course, as genies tend to be, at least in their standard depictions. The small vest did little to hide the genie's thick pecs and taut abs, and the various bits of gold jewelry simply called attention to his mighty arms, rather than obscuring them.
Davis' obsession with improving his physique, implanted just hours earlier, flared up. He felt jealousy as he viewed the genie's superior body.
Davis turned to face his servant directly. "Genie, I wish to have much bigger and stronger muscles, like a bodybuilder."
The genie smiled, and nodded in response. The basic wish was good, and was certainly the direction he'd been pushing Davis in. But of course it could be improved. It could be pumped up several times, simply by adding in "a morph of."
Time flipped backwards for a few seconds, and Davis repeated his wish: "Genie, I wish to have much bigger and stronger muscles, like a morph of a bodybuilder."
Again the genie smiled and nodded. "Of course, Master," he smoothly replied.
Davis gasped as his body changed, power surging through him. His muscles trembled and swelled, getting bigger and freakier, growing dramatically. Even though he was wracked by pain, Davis let out a low growl of pleasure, loving the sensation of getting bigger and bigger. Every muscle expanded, getting thicker and rounder, the veins showing more prominently under the skin while the cuts between muscles deepened notably. In moments Davis was the size of a heavyweight bodybuilder, then a superheavyweight, and then larger still.
After a minute the growth finally slowed, then subsided completely. Davis, panting heavily, his huge chest rising up under his chin, stared at his reflection. Every muscle looked bloated, beyond what was humanly possible. He looked like a character from a comic book or a video game, not like flesh and blood.
"You are now 500 pounds, and mostly muscle, as you can see, Master," the genie explained, standing aside. Davis looked at the genie in the mirror. A huge grin spread across his face: he was significantly bigger than his muscled servant! Davis' jockstrap went wild at that, his cock growing within, then bursting free, reaching out to its full fifteen inches of freakish meat. Davis reached down and grabbed the root of his dick. He tried to pull out his balls as well, but they were already swelling up, getting bigger and bigger in his growing sack. Snarling he snapped the elastic of his jockstrap, freeing his constrained nuts.
"Fuck I'm horny!" Davis growled, his muscles mashing together as he tried to get both hands around his dick. But his huge arms and pecs mashed against one another, getting in the way. Only with great effort could he get both hands around his fifteen-incher at the same time, and ultimately he gave up, content to stroke his shaft with a single big hand only. He looked over at the genie.
"Genie, I'm so horny!" he complained, "I've got to fuck before these nuts explode!"
"Is that a wish, Master?" the genie asked smoothly.
"Fuck!" Davis swore, working his knob over with his calloused hand. "I wish to have sex!"