The orc holds the loincloth under your nose, you have no choice but to breath it's musky smell, and nothing but its musk. You sniff, new savage urges rising within you. In a quick swipe, you claim the loincloth, you hold it to your nose as you retreat to the corner of the cell. An odd sensation sweeps over you, but you ignore it and keep sniffing. Orcs are dumb brutes, but you'll be damned if they don't smell amazing.
The orc laughs behind you as he realises what's happening "I was hoping for another orc, but this will do fine." You hear heavy footsteps from behind you as the orc roughly grabs your fur, did you have that before? You have no time to think as you are turned around, your back hitting the wall. The loincloth dropping out of your hand, you roar at the orc, and he replies by rubbing a hand through your chest. You feel his hand groping your growing muscles, pushing against your brown fur. You look down at your chest and see your body stretching. Short brown fur covering your frame as your muscles expand and harden.
The orc roughly pulls at your fur as he explores your figure, you feel the fur moving across your now much longer arms. You tense your arms, feeling the new primal might as you wrap yourself around the orc and bring him close. His tusks rest against your neck, biting into your stiff figure as you feel the fur spread. As it covers your neck, you feel your canines elongate, your new teeth befitting a savage. Your nose presses against your figure and your ears stretch, the orc tugs at your stretched ears. You yell in pain, which the orc uses as an opportunity to enter your mouth. His tongue presses against yours as you feel his tusks rest against your cheeks.
His arms hold you tight, as you feel your final changes occur in your legs. Your feet harden as the fur spreads, muscle appearing with the new fur. Finally, the fur covers your balls, as your member thickens.
The orc continues his aggressive assault against your form, but you do not plan to let this orc dominate you. You stretch your long arms, resting them against the orcs ass. He breaks the kiss and looks at you suspiciously, you give him an evil grin as you shove a finger into his ass. He moans, his body resting against you as you play with this orcs ass. You fit another finger in his hole, then another. Three fingers rest inside him, the orc whimpers "Urgh, P-please, I need something thicker in me."
You oblige the orc as you move your fingers out of his ass, turn him around, and shove him onto the ground. The orc lifts his ass in the air for you, you look at it hungrily as your cock rises to full erection. In a rough press, you penetrate the orc, your cock violently thrusting inside this green-skinned brute. He moans, louder and louder. You hope the other orcs are hearing this mans cries. As you thrust you feel the orcs form, returning his rough gropes from earlier with your own violent play. You feel each inch of this brutes muscle, you must admit it is more impressive than yours, but orcs are all muscle and nothing else.
You eventually feel your balls churn and your cock twitch, you hold the orc still and shoot your seed into him, the white liquid leaking out of his abused ass. You exit to the sound of the orc laughing "Hah, with treatment like that, you're more orc then bugbear!" You smile at the orcs words, then spot the discarded loincloth in the corner of the room. You pick it up and notice that not only does it still have the orcs musky smell, but is now coated in your seed. You look to the cell opposite yours with a grin, approaching the prisoner with loincloth in hand.