Liam chuckled and kissed the end of Mike's nose. "You are sure an affectionate one! I'm going to enjoy working with you. So, you willing to reciprocate?" Mike felt confused a moment, then remembered Liam's engorged donkey cock. With the teen up on the box, his crotch was within easy reach of mouth of hands. The choice was made as Liam gently pushed Mike's head downward. The mottled pink and black donkey cock gave off a strong musky scent. Mike snuffled at the flat tip, then began to lip and lick the swollen head . His thicker lips were also more muscular - he could control the pressure better than he remembered being able to do before.
Liam shivered in pleasure, but still managed to run the brush over Mike head. The already dark brown hair turned black, and then thickened and lengthened in the middle. Rubbing the skull with his free hand, Liam grunted and had to stop a couple of times as his own orgasm built. Even with the interruptions, he was able to shrink the back of the skull, causing the dome to flatten down behind brow ridges that grew more pronounced. The brain inside also shrank and changed shape. Although he lasted longer than Mike had, the equine sexual pattern was fast and furious as befit a prey animal. He came with a gasp. filling Mike's mouth with his equine seed.
When Mike straightened, he had some semen running down the corner of his mouth that he licked up. He looked dazed, but pleased. Liam grinned and rubbed under his chin. "That was perfect. Good boy."
Mike swallowed the thick semen and blinked, feeling a rush of happiness at the compliment. Then he felt confused again. Why did pleasing Liam make him feel so happy?
"You are all Shire below." Liam grinned at him, admiring the centaur's very equine skull and protruding lower face. The centaur was unrecognizable now, even though he was not really aware of the changes that had been made to his head. "What I would really like to do is fix up the top half. You don't mind if I finish you up now, do you? Conner and I both want our beautiful Shire stallion. When I'm done, you can spend time with her and get a foal started. And then I'll clean and groom you, and give you some food and water in your own stall."