Karyn tossed the stone to us and started checking herself out.
"One turn deserves another," I said, picking up the stone, "Buts lets make it a little interesting. I wish that you had a huge male horse dick instead of your female genitalia!"
"Hey!" gasped Karyn as she felt a rather large and prominent appendage growing to dangle between her rear legs.
Before I could react, my left hand grabbed the stone, taking it from me.
"As we're split into two different people now I think I should get a go too," said my twin "Okay, humantaur equals human-centaur right? Well centaurs have hooves, so then I wish Karyn had hooves for feet."