You walk over to the two person rubber horse costume.
‘I want to try this, but without the head on so it makes us a centaur.’ You say holding up the horse costume.
“I take it I’m the ass then.”
You nod your head. Alex shrugs. “I guess that’s payback for wanting to clime on your shoulders with my idea.”
You put down the horse costume and Alex starts to take off his clothes. ‘What are you doing!?’ You ask covering your eyes so you don’t look at Alex’s junk.
“These costumes are magical remember. I don’t want clothes getting in the way of the experience. I suggest you do the same.”
You can’t argue with that and start taking off your pants, thankfully no one was in this part of the store except you and Alex.
Once undressed you slide the front part off the costume up your legs, carful to keep most of your waist at neck level of the horse. You feel a breeze go across your exposed naked butt and shiver. ‘You done yet?’
“Just a sec. I need to hype my self up for this first.” Alex responds. He breathed in then out, then shoved his nose between your butt cheeks, you let out a scream in surprise, but still zip up the horse torso trapping Alex inside. Once the torso was zipped up all the way you feel an electric shock travel down your back, you think your’s and Alex’s nervous systems just fused together, at the base for you, and no doubt at the forehead for Alex. You could both feel your spines now end at the tip of the horse tail.
The rubber horse suit begins to tighten around your waist and legs, no doubt suffocating Alex. You feel Alex trying to move around inside the hot sweaty space but it was too late now. Your legs begin to tingle, you feel the rubber tightening around them, your feet begin to get longer, filling out the hooves, the rubber got so tight you begin to be able to feel the temperature outside the sweaty rubber suit. And through your now shared nervous system, you could FEEL Alex’s legs going through a similar change, only after suit was tightened around his legs (and crotch), his legs joints begin to alter. Both you and Alex feel as your shared back legs bones snap then reform to bend the right way for a horse, but the wrong way for a human.
Once that was over more of mostly Alex’s bones begin to change to suit a horse. Alex’s skull split, becoming shoulder blades for your new front legs. His rib cage grew larger, encompassing most of his new form, bones in his arms forming newer ribs. His and your spines became more and more indistinguishable from one another curving at a ninety degree angle to accommodate you both.
Alex’s muscle changed as well, till you couldn’t even tell there had one been a human in the horse section of the body. However Alex wasn’t the only one to suffer muscle changes. John’s once average young body received a boost in vitamins. Increasing your muscle mass to that of a healthy adult. You flex your impressive new guns almost distracting you from what was happening below your waist. You don’t even notice as the rubber changes to brown fur.
Speaking of below the waist, your attention is drawn back to it and you let out a loud involuntary deep groan as you feel a new cock to replace both yours and Alex’s to share begins to grow from between your back legs it reaches 18 inches then finally stops, much to both your re leafs.
With no further changes you turn your back and look down at your horse butt. It was hard to imagine Alex still being alive in there. For all you knew he could be dead and your just using his meat to fill out the muscles. This wasn’t helped by the fact you could feel the parts Alex supposedly occupied.
‘You okay in there Alex?’ You ask not really knowing how he’ll respond if he was still alive.
...
‘Alex?’
...
‘Come on. Can you hear me?’
...
Still nothing. This wasn’t good, making he really was dead. Maybe when you took off the suit a bunch of horse organs woul—
Phfffffffffffffffffffff!
Your thoughts were interrupted as you let out a long loud horse fart. ‘Gross Alex.’ You say waving your hand infront of your face smiling. Okay, that was a good sign, you didn’t let one rip on purpose, so Alex was still inside you. And able to communicate in farts. You look down both sides examining your new body, then freeze and frantically look around for it. Once you confirm it. You finally tell Alex. ‘Alex, if you can still hear me... the zipper’s gone.’ Your Back legs just stand motionless. You try to move your back legs but find it more difficult than your front legs, maybe you weren’t use to moving four legs, or maybe Alex was blocking you.
‘Come on Alex. If we just stand here nothing will change.’ You say, trying to get your back legs to move.
‘Maybe our Uncle Jack can help us.’
Your back legs some how seam more open to the idea of movement now if it was towards Uncle Jack, but that could just be your imagination.
Regardless you slap your own ass, (even though John felt it just as much as Alex did) and say: ‘guidy up!’
Your back legs still stand motionless, but eventually start moving towards the red curtain you and Alex came through originally...