You spot a black bottle on the shelf. "Ah, I see you have a fine eye," the clerk says. "That's our Skunk Cream, perfect for all sorts of furry fantasies. You think for a moment, this would be the perfect way to test and see if this guy's legit.
"Can I have a sample?" You ask pleadingly.
"Of course," he responds grabbing the black plastic bottle off the shelf. You start to roll up your sleeve until he interjects, "No no, that's not how you put it on," he motions towards your pants making a downwards motion. You hesitate for a moment, but glancing around the vacant store, slightly reassured you no one would see. You pull down your pants and show off your bare ass to the clerk, trying your damnedest to cover up your cock from his prying eyes. He puts a small amount of foul smelling lotion on his finger and begins to count down," 1...2...3!!!!!," on the last digit, you feel his fingers penetrate deep into your asshole, smearing the cream along your rectal walls. You moan loudly from both sensation and shock, feeling him slowly retract it from your butt.
"Now watch the magic happen," he says grinning. You stare at him blinking for a moment about to speak up, but you're interrupted by a tingling sensation that envelopes your body. Thick, dark, jet black fur begins to cover your ass, slowly spreading out to the rest of your body, changing it bit by bit as it does. The fat on your body seems to dissolve, being replaced by a more toned frame. Your hands and feet grow to massive sizes and growing claws each digit, leaving massive clawed paws in the wake of the changes. You moan loudly as you feel your human cock stretch to over a foot long and thicken to the size of a beer can, the surrounding penial skin turning bright red as it grows. Your pleasure is only further heightened by the oddly arousing sensation of your massive fluffy skunk tail growing out of your spine. You feel your face change last of all the fur growing , ears moving, nose pushing foward, the teeth sharpening, it's the quickest and easiest part of the transformation. The clerk walks over a full size mirror and sets it in front of you so you can see your new form. You find yourself very simply in love with your new furry, skunk body. You stare at your body a for a while, finding yourself playing with your massive balls and sniffing your own fur to inhale your own deep musky, skunk stink. Out of the corner of your eye you spot the clerk sweating a bit, licking his lips.
You turn to the clerk "I love it," you say. "How long does it last?" You ask eying the bottle full of the tonic imagining all the freaky furry sex fueled nights that are on the horizon.