"Donkeys love donkeys and one species lives with its own. You changed your brother and friend to Donkeys giving them each the other for to have their sex. You Brian shall join them in the barn but I suspect you shall find yourself not quite on their level!" chidded Madame'.
"No, no, no!" begged Brian.
It was too late and past the point of return. Madame'Illusia shook out a white powder over Brian's head. He screamed first of fear and then screamed on out of the agony.
Reeling of wierd pains the friends had not known he was changing and shirking all to once.
"What, oh god what are you doing to me?" screamed Brian as madame backed away letting the magic dust settle.
Arms shortened, legs too as his body grew long and chest though smaller barreled outward. His screams changed to high pitched whinnies as the shape of an equine form was now his.
"Cursed are you Brian, a Felabella pony stallion be your form. Short but a stallion you can sniff Troy's vagina, taste her drippings, but unless you find a stepstool you can never have your pleasure!"
As two Donkey friends were in mounted delight their short friend had to stand below and lick.