You continue to make out with your old, beastial lover, slurping down the warm shit he shovels into your mouth, feeling his hard cock press up against your furry leg. Suddenly you realize how fucked up this all was, and now the janitor has to deal with the results of your fetish forever. Quickly you push him aside and remove the costume. It's almost like feeling yourself deflate, almost instantly your back down to your 17 year old naked human self. The creature stares at you confused, cock still erect. You try to dig around the piles of shit to find your clothes until he grabs your face and gives you a big fat kiss, sticking his tongue in your mouth. You taste it, the shit you were feeding him, the rancid yet delicious taste now in your mouth. You start feeling dizzy as he grabs a handful of the stuff and forces it down your throat. You feel your face begin to shift, and your body begin to grow. Black fur covers all your skin except your ape-like face and palms. Soon you don't need the costume, you're a permanent filthy bigfoot. You stare at your old lover, now a foot shorter than him because you're now so much younger, but neither of you seems to mind. You shove your face into the rapidly growing pile of dung and wolf it down. You look back up and see his hairy gray cock drip with yellow cum and decide you must sample that too. You grab the organ and suck on it, with your fat lips releasing a tidal wave of yellow seman into your shit filled mouth, causing your sasquatch daddy to moan in pleasure and let out a loud gassy fart. You rub your rapidly expanding scat filled belly and drop a sloppy wet dump onto the floor, happy with your new permanent beastial life, as the two of you proceed to slurp if right back up