It became so normal for Derrick to pleasure other boys that he could have sex games even in classrooms as long as they did not disturb other students. One of his favorite partners was Jason, a long-time friend who really liked Derrick's form and spent a lot of time with the horse-boy. Which is why, during a long snuggle session one night, Derrick thought of his time back in the stables and wished he could return. And found himself laying in the straw of his centaur's stall still snuggling with Jason.
The human sat up, wide-eyed as he looked around. Already naked, he stared as Derrick stood and offered him a hand. The horse-boy was welcomed back by his co-workers, and his centaur was thrilled to see him again. Jason stood back and watched in awe, overwhelmed by the smells and sounds of a stable. He wandered the huge facility before returning to Derrick's place. The horse-boy grinned. "You can be as I am if you want. Even better, you can be as I will be soon, a groom like all of the others. Forever."
Jason looked around, then said "If that is my best choice, I welcome it. But I would really prefer to be a total animal. Is that possible?"
Derrick nodded. "Of course! But such a choice is likely to be permanent. Once you get settled into being a beast, you will forget you were ever human. That means no return, ever."
"But I could be any kind of animal? A horse, a lion, a cow?" Jason nodded. "I would happily spend the rest of my life on all fours, forever a beast."
Derrick nodded. "Come on, then. I will take you to the Main Desk. They can figure out the best place to send you." In short order, the horse-boy led Jason to the Spa's reception, where Jason was offered a choice. He can go: