Kaden bit his lip, carefully considering the now larger cock in his hand. It was cool to be able to make himself so much longer, but was there anything else he could change about his dick?
After a few more moments, he came up with an interesting idea. Perhaps he'd try and see if he could reshape his penis into something else entirely, and perhaps something non-human.
A quick thought, and the transformation was set in motion.
His already 9-inch cock begins to expand further in pulsing waves, each one stretching the cock he's holding out further. Each wave of growth is immensely pleasurable, the slight burn of the skin elongating past it's previous form sparking arousal deep in Kaden's gut.
The throbbing, pulsing waves are in sync with his heart, keeping a steady rhythm as his cock changes. It begins to grow out further than before, each beat of his heart bringing just a little more length, a little more girth.
Kaden allows his back to hit the wall behind him, sliding down to sit on the floor as the transformation continues to pleasure him while all he does is sit there, holding his cock on the bathroom floor, already with the remnants of his last orgasm streaked across him.
He gives a testing stroke with the hand wrapped around his dick, gentle and tentative. Even that little friction is enough to elicit a moan, and Kaden bangs his head on the wall as he tilts it back.
Kaden gently grasps the head of his cock, feeling it expand slightly with each beat of his heart, gently toying with his urethra. With this, he feels the head start to flatten, slowly swelling disproportionately larger than his shaft.
The flattened head of his cock continues to increase in size, soft bumps slowly forming alongside the outer edge.
Feeling the new textured surface, Kaden's interest in watching his transformation renews. His newly flat head is almost heart-shaped, and the entire cock is nearing almost a foot in length. If he was soft, that would be enough to dangle all the way down to his knee.
As his shaft continues to grow, and grow, and grow, a ridge begins to form about halfway about his elongating cock. Kaden reaches to toy with it, his hips bucking up into his hand at the new sensations it grants.
His cock throbs, gaining just a couple more inches, before the heat of the transformation passes for a moment.
As he inspects his new cock, gloriously long and equine, Kaden is hit again by just how big it is. Over a foot long, with a head almost as broad as his palm, with a shaft nearly girthy enough to match.
He takes another tentative stroke of the cock, reveling in the sensation of so much meat. With a hand at his base, the entire thing is long enough for the head to be slightly bobbing in time with the blood coursing through it.
It's then that the transformative heat returns, focused on the skin beneath Kaden's hand right at his dick's base.
Kaden quickly takes his hand away, staring as his beautiful new cock seems to shrink into him, the base bunching up in soft layers of skin. A quick investigation shows that it's nearly as sensitive as before, and hugs his cock tightly.
Stretching the pliant skin, Kaden slips a finger down into his new sheathe, finding the flesh beneath hot and more sensitive than he could've imagined. Plunging another finger to join the first, he scissors himself open, fighting for what little space his cock leaves open and he brings his other hand up to stroke the fantastically long length before him.
He bucks up into his own fist, the fingers in his sheathe digging deeper with the motion.
The arousing warmth of transformation continues, following the new sheathe back into his body slightly, creating the space within him necessary to allow for his cock to fully retreat into the crevice. More space means that Kaden plunges his fingers deeper, the meat of his palm soon meeting the soft outer skin.
While Kaden is preoccupied experimenting with a piece of his genitalia that's entirely new to him, the pulsing transformative energy migrates once more, soon reaching his balls. Next to the huge shaft, Kaden's still human sack looks almost comically small in comparison.
But that won't be lasting much longer.
Each beat of Kaden's heart means that his balls balloon bigger than the last, the new mass quickly filling with cum to be loosed. The sparse hair on his sack begins to vanish, the skin tight across his swelling nuts. The skin soon begins to darken, turning almost leathery as the testicles within continue to grow larger.
Taking the hand off his cock, the other still delving into the depths of his sheathe, Kaden cradles one of his balls. It's massive, making their state from before look minuscule. The flesh of it nearly spills out from his cupped hand, the already-generous size expanding even more.
Soon, his balls are nearing the size of grapefruits, still tightly wrapped in a sack stretched tight across the growing masses. As the growth begins to slow, the skin finally manages to catch up, dark leathery brown loosening to allow each testicle more movement within their confines.
With that, the dark coloration of his newly enlarged nuts begins to spread across the rest of his new package. Kaden's sheathe quickly darkens enough to match, a brown that's nearly black. His cock isn't far behind, though the brown only makes it up halfway before it begins to mottle with a soft pink that overtakes the top half of his dick.
Finally withdrawing his fingers from his sheathe, and letting his gloriously large ball fall to the side for now, Kaden grasps his massive shaft with both hands, stroking ferociously.
It's not long before his balls are drawing up tight against him, and the head of his cock begins to flare out even larger than before.
A generous amount of cum floods out of his new equine adornment, splattering onto his chest and the floor below him.
Basking in the afterglow, covered in cum, his drooping dick beginning to lay limp against the floor as it slowly begins to retreat into his new sheathe, revealing the still-human balls beneath, Kaden contemplates his next move.