You feel your bowels tighten as you try to respond to the voice, your cock growing harder to prepare for this next orgasmic load. You try to let out a reply but all that comes out is a loud yelp as thick layers of shit slide out into the diaper. You moan loudly passing the orgasmic load, as it rubs against your crotch, covering it in your manure. It continues to inflate with your cum, like a balloon that just won't burst, causing you to moan louder and louder as it pushes foward, a large bulge pushing against the diaper walls, rapidly expanding into the organ of a stallion, bursting forth with a thick white torrent of seaman as you grip it with your hands, filling the diaper with a sick mixture of cum and shit. You withdraw your hands from the brief and instead of the human hands you put in, thick, muscular gauntlets covered in coarse brown fur emerge. You run your hands down your ass and find a large black, wirey tail protruding out of the diaper. You quickly come to the realization that the shit will transform any skin it comes in contact with and you have alot more body to go. "Keep going," says the employee who you quickly realize was watching the whole time, this one with a blonde horse tail and matching set of ears. You nod to her, ready to coat yourself in your own shit, to fulfill both of your fantasies.