Derrick looked over at the minotaur and grinned. "Could I get another look?"
If Bull was offended, he sure gave no indication. He undid his loincloth and tossed it to Derrick, who stared at the heavy black sheath and ponderous balls. Stepping forward, the teen reached out a hand, reddening a little, then pressed his palm against the coarse black sheath. The minotaur watched him impassively, which encouraged Derrick to get bolder. He rubbed the minotaur and watched as the thick dark penis began to push out again.
Bull grunted and shifted slightly, then raised his dark, three-fingered hands to rub the sides of Derrick's head. It felt odd, but pleasant. As the massive animal shaft emerged, Derrick's hands moved to grasp its foreskin, sliding it back and forth. Bull mimicked the action on the sides of his head, the thick, hard digits pressing his ears and massaging his temples.
It only took a minute of masturbating the minotaur to get him fully erect, the wide piss slit dribbling pre-cum just inches from Derrick's mouth. The teen was only barely aware of long pleasurable strokes and sexual pressure that was somehow in his neck and head. It felt like the minotaur was masturbating his skull.
Derrick took as much of the wide bullcock tip into his mouth as he could, and used his tongue to probe the slit and swirl around the sensitive cap. At the same time, he felt the coarse, sloppy tongue of the mintaur slide over the top of his head. It was a very strange sensation, almost like his own cock head being sucked, but he liked it.
The mintaur started to buck slightly as he built to a rapid climax, and the thick bullcock throbbed in Derrick's mouth and hands. He felt a similar throbbing roll up his shoulders, neck, and head, the minotaur's tongue sliding over the slick, sensitive skin of his scalp, a deep pressure that wanted to shoot up his back. It all felt incredible, but he also realized it was very strange. The sensations were what he expected Bull was feeling in his massive cock, but this was focused in Derrick's head. Realization came too late, for at the moment he understood, Bull came with a gush of heavy semen that filled Derricks mouth, and splattered over his face, while a matching ejactulation shot from the top of Derrick's head to coat Bull's muzzle.
The intense pleasure almost made Derrick black out, and Bull caught him as he slumped to the ground. Derrick was confused, aware of Bull staring calmly at him, and a thick warm cover that was trying to slide up his face. He reached up and pulled at the cover, his fingers meeting heavy, coarse flesh that he felt both in his fingers and in the flesh itself. Then Bull reached out and seemed to tug the cover downward. Derrick's arms were forced down to his sides. He struggled to sit up, but his legs were not cooperating.
Bull put a hand against his back and lifted him upright, though his whole body was sagging. Derrick was able to look down and see why his legs were not working - they were gone! Two enormous black testicles lay before him, a bull's scrotum like that of the minotaur. Derrick stared in shock and awe, the heavy cover now extending to what had been his waist. It was a sheath, a monsterous animal sheath that surrounded an equally monsterous black bullcock.
Derrick would have screamed, but his mouth, his lungs, his whole body was now the bullcock. Vision blurred, and faded, sound and smell was also lost, until all he could do was taste piss and cum and feel the pleasure of being masturbated. He couldn't have become a giant bull cock and balls! It was impossible! It was... he shuddered and went rigid as another massive load of bull cum shot out of his head, followed by yet another. The pleasure was so intense it was all he could think of. Awareness was focusing in, getting simpler. Derrick felt no fear now, he felt nothing at all except the pulse of blood, the pressure, the awareness of a cock.