Upon entering your house, you fail to see your girlfriend. Has she arrived yet? "Paula, where are you?" you call out, to no response. Maybe there were unexpected delays in her flight back? Assured, you head to the living room and lay your lower body on the couch, anticipating her return.
The scent of dog food enters your sensitive nose. No, not the brand you usually buy, the cheapest but with the blandest taste and the least nutritional value. It is a much more savoury brand you only occasionally bought if you had a bonus of some sort, just one step below a pack of dog treats. Following the scent, you crawl upstairs to your room and see the exact brand that you recognised by smell. Strangely enough, there's a sticky note on it saying "EAT ME ALL IN ONE SITTING". There goes the plan to cook steaks for yourself and your girlfriend — the premium kibble is simply too irresistible. Hearing your stomach rumble, you tear open the bag with your claws and gorge on the contents within, table manners be damned.
Quickly emptying the whole bag, you fall on all sides (two arms and four legs) and sniff at the bag for more of that sweet sweet smell. It's as if you've gone feral and was driven by instinct, when you of course weren't, as dictated by your wish.
"It feels so warm here…"
Wait, what is that voice? Why does it sound so much like your girlfriend? And why does it come from INSIDE of you? You weren't talking, for sure.
"Do you hear me?"
"Yes, where are you? I can't see you…"
"In your stomach, silly!"
Wait, what? Does that mean she IS the kibble that you just feasted on?
"I thought we needed some intimate time together. I saw the lamp with the genie in your room and instantly knew what happened, my memories of you couldn't just so suddenly be overwritten by that of a dog taur. And that's how I ended up as that bag of kibble. Don't worry, I won't die when I'm digested. I'll just become the poop that you will then expel. My 'head' is in the first set of intestines now."
"That's great, but… what happens after I expel you as poop?"
"…We'll cross that bridge when we come to it. It's just so euphoric having my nutrients sucked out of me while the remnants become poop, even if it's gonna take some time. Half of me is still in your stomach."
You walk to your bed and lie belly-up. "Whoa, didn't expect that much sloshing," you hear inside your upper torso. She begins to squirm a bit along the digestive tract, and you can feel your organs being pushed around.
"Wait, I see… another stomach?? What!?"
"I'm your, I have two copies of organs other than the head, the bladder, the anus and the reproductive ones. You have to endure the process a second time again."
"Endure? This is hecking awesome and I can't wait to go through it again!"
The squirming continues until some half an hour later when you feel a pressure at your butt. "Oh good, there's already another turd here, it's a bit suffocating having my face smushed against it. Okay, you're gonna go soon. Where do you plan to release me?"