"I can do that, but not precisely." said the Sorceress.

"What do you mean, not precisely?"

"Imagine there are three coins. If you leave now, I flip none of them, and you remain as you are. But if you really wish, I can flip one of them. Only one, and only once. One coin will transform you into a centaur, for sure - but it might land male or it might land female. Stallion or Mare. No choice, it just is. Another will transform you into a minotaur, for sure - but again it might land male or it might land female. Bull or Cow. No choice, it just is."

"And the third coin?"

"You remain your current sex, for sure. But it can land centaur or minotaur. Again, no choice. It is just is."

"Oh."

"You see? That's why I am telling you to think this over. I can do what you ask about, imprecisely - and only once. It's a one-way trip. There is no going back. The only choice you can change later is to have me not change you at all. There. Now I have warned you. Your decision is now YOUR problem, and yours alone. You have a choice to make. I suggest you take some time before deciding."