The stable boy then began to gently stroke the horse half of Mike's body with the mystery brush. Then, despite the fact that Mike was being held captive he couldn't help but relax under the gentle strokes of the brush.
Plop... plop, plop, plop.
"What was that?" Mike said startled at the sudden noise.
The stable boy then suddenly started laughing. "Now I remember what this brush does! It makes centaurs permanently lose bowel control!"
"What!?" Mike shouts. "Then you mean that the sound I just heard was..."
"Yup." The stable boy says gleefully. "You just dropped a steaming pile of centaur shit. Better get used to it, because from now on you will never have any control of your bowels or your bladder. So for the rest of your life you will be pooping and peeing where ever you stand, just like a real horse!"