You note that the donkey ass only covers your backside, unlike the rabbit foot that had encased your own. Maybe you can pull it off this time!
You grab it by both sides, holding it as tightly as you can, and then start pulling backwards. At first you feel nothing, but then you notice the thing slowly pulling off and losing it's grip. Success! You pull harder, and it starts coming off more. Soon it's almost off, and you think you'll be rid of the thing, when a belt suddenly shoots out of the latex and wraps its way around your waist, pulling tight and bringing the donkey ass back to yours. You let out an angry shout then look down to survey the damage, only to find that it's not done yet. As you watch, the latex trickles down from the belt, eventually covering your genitals and wrapping its way around to the backside, coating the entire space from your waist down to the tops of your legs. The crotch is smooth, with only a slight bump in the material conveying what it covers. With that it stops, leaving you wearing a massive chunk of pink donkey just below your waist.