Kinverse: Volume One

PATH OF THE EMERALD MAIDEN

A naive young monster's tale by Moros, aka KinverseWriter

Legal Disclaimer: All publicly recognizable characters, settings, etc. are the property of their respective owners. The original characters and plot are the property of the author. The author is in no way associated with the owners, creators, or producers of any media franchise herein mentioned. No copyright infringement is intended. All characters and events in this story are entirely fictional. Any similarity to actual persons, living or dead, or actual events, is purely coincidental. This work of fiction contains disturbing content.

Reader discretion is advised.

Description:

A young woman from a pre-neolithic society is accidentally whisked away to another world entirely during a raid on a research lab run by alien invaders. Stranded with no friends, badly injured, and no idea where home even is, she's forced to live off the land and learn how to survive in this strange and hostile world.

There's only one slight problem, though.

She's not trapped in this world with them. They're trapped in this world with her.

Categories:

Adventure, Coming-of-Age, Isekai, Erotica.

Disclaimers:

This story contains sexual elements and disturbing themes. The contents aren't purely intended to be pornographic, but some scenes objectively are. This is about a giant monster that eats people, so reader discretion is advised. This story contains vorarephilic themes.

This story will have a very slow and intermittent pace to begin with. True stakes don't really show up until halfway through, though the build-up is always there in the background. This is ultimately not a story of grand adventure and defeating one's enemies to rise to the top, it is the tale of a lost and naive young woman growing as a person and learning new things. It is a personal one concerning her, and thus this story will be told in present-tense first-person.

Chapter 9: Til Death (XvG)

---

A/N:

For reference, the protagonist is pretty large--about the size of a horse right now, with a squatter stance, thicker legs, and a wider body. This chapter has a non-canon version to it, Chapter 9b, which is the original version kept for posterity reasons prior to a rewrite done to match future plot direction decisions.

Warning: last chapter had some sexual content depicted in it. This one does too, with a similar clinical point of view, but after that...

The other half of nature's gonna happen. This chapter is the 'viewer discretion is advised' chapter, with the next big one being chapter 12 for different reasons.

Do note that this chapter is explicitly meant to be disturbing to the reader.

---

The next day, they really didn't do much. The male was still a little bit skittish, staring off into the woods occasionally and almost spotting me a few times. If he did see anything, he didn't seem to react. Judging by how he followed my tracks last night he does know that I'm here, but I doubt he would know what I am.

They took out the device again today, observing it as it showed them more strange scenes. This time the male was facing the created-nest's entrance, so I couldn't observe them. Perhaps he is worried and has realized that he is being hunted.

He seems strong. I will eat him first.

I will attack in the night. It's the night of the no-moon, and good night vision is rare even on nights such as this one will be.

---

“It's nothing, you big baby," Susan says. “Stop staring at the ground and come fuck me already."

After a long day of binging more movies, as the sun went down, Susie beckoned me back to the tent to finish what was interrupted last night.

“Fine, Susie. You're right," I say. “You're aaalways right, too many horror movies where the hot couple out alone in the woods get killed by the movie monster..."

But I know what I saw. At first I thought I was just being paranoid, but I know what I saw.

Ever since yesterday night I couldn't shake this feeling of being watched. At first I thought I was just being paranoid, but… now I know for sure. I'd mentioned it a few times to her, but she wouldn't listen, dismissing it and laughing at me, saying we 'shouldn't watch any more horror movies for a while, then.'

“Ha! Well hurry up and get back to the script then, 'Soccer Spence.'" She slaps her ass and crawls into the tent.

I blankly follow, lost in thought.

I paid attention today. I found more tracks. There is absolutely something out here with us, and I don't know what the fuck it is.

In the light, I could tell I was right about their shape, but another weird fact emerged as well. There were two sets, along the same route, as if something was on its hands and feet, walking around like that.

I enter the tent behind her, but even the thought of continuing our little 'early honeymoon' can't take my mind off of things.

One set was the one I saw last night; three toes facing forward, one back, all with claws, but for some reason one of them was simply a rounded press into the dirt, like a knee in the ground. The other set was… almost like a hand. It had four fingers and one thumb.

A freaking thumb.

It's either a fuckin' alien, or I was right the first time and somebody is out here punking me.

But maybe that's what's happening. Maybe Susan's right, and the horror movies are getting to me. Susan wanted to watch Alien tonight before I brought this stuff up, but I'd really rather not.

I don't know.

Turning back around, I distractedly zip the flap most of the way closed. Susan is already fast at work, swiftly undressing. As I turn to face her, she looks up and gives me that look she's so good at. Bedroom eyes, slightly parted lips, finger raised and beckoning.

Hnng. Gets me every time. Maybe I do just need to relax and unwind. Knowing Susie she'd probably get off to the idea of someone watching us do it. She may be a sex freak but damn do I love her.

---

As soon as the male entered their created-nest, I approached it. Just like before, he didn't fully close it, and thus I'm able to see in. Unlike earlier today though, they're doing something other than watching the device.

I believe that they are going to mate again, based on the scents lingering from the excited female. My own excitement and anticipation--for both learning new things and my impending meal--wells up within me.

I bring my head down low and peek an eye in to begin my observation. The female is mostly undressed now; the male swiftly following suit before crawling over to her within their reasonably sized shelter. I could probably fit in there pretty well but I would need to either curl up or sit up bent over.

At first they once again perform those strange acts on each other--but this time, having learned from my mistake, I don't attempt to imitate anything... yet.. After a short period of the act I accidentally interrupted--the female eating-but-not-eating the male's penis--they reveal to me more knowledge.

Going over to a soft container, the female pulls out a small nearly flat rectangle with a raised circle pressed within it. The male sits back near the side of the tent, and she tears open this very small container revealing a weird ring which she brings over to the male.

Grabbing his penis and giving it a few tugs to ensure that it is still stiff, she lines up this very small covering with it and pulls it down over the tip and down the length. The male cusps her breasts with his clawless hands as she does this, vocalizing softly.

How curious...

Getting on her rear and sliding forward, she embraces him before sliding her legs around his sides and leaning back, head resting on a pillow and rear upturned towards her lover. He shifts a little, and bends down over her, kissing her on her lips. I suppose that explains what they were doing yesterday; lip contact must be a sign of affection, like cheek- and neck-rubbing.

Lining himself up with her sex, he slowly penetrates her, finally confirming for sure to me that they are mates, and that all of this prior wasn't just some weird thing they did. With this done, he begins pressing himself forward and back, mating her. We're now back in familiar territory.

But what was that thing she put on him? Would it not interfere with the process? They both seem to be enjoying it, she panting and moaning, he breathing steadily heavier.

After doing this for a while he bends lower over her, pumping harder now, before slowing, stopping, and hilting in her as she moans. Slowly, he pulls out, and while I can't see her slit from where I'm looking in from, I can see the covering still on his penis, its tip now filled with his semen.

So that's what it does. It… prevents fertilization? But… why?

Why mate if not to reproduce? This is… new and strange.

Why mate if not to reproduce…

Why, why, why?

If not to reproduce... and it's enjoyable, then...

Is it to enjoy it?

Woah.

With this revelation, my world expands.

During heat, Kin mates mate at least once per day when possible for the whole period. Mother says that just once is enough for fertilization, though multiple times all but assures it. I never did understand why exactly they did it so much then, but now, I do. It's for pleasure. It feels good, much like a good hunt, a victorious brawl, or a full belly, but as if each is combined and compacted together in a storm of good-feel.

The male is definitely done now. He reaches down to his now-flaccid penis and carefully removes the covering before setting it in a clear soft container, itself in a box. Notably, none of his broodling juice seeped out, so it definitely has to be for stopping pregnancy. As he turns around from doing this, his eyes pass over the hole in the tent's flap, and he sees…

Me. My eye, specifically.

He screams, falling backwards and crawling away from the flap.

I slowly back away from the created-nest, which erupts into vocalizations. I couldn't smell the 'arousal' at all during their mating, but now, it practically explodes from the structure.

---

Exactly what I needed to forget about all of this shit.

Turning, I remove the condom and put it in a ziploc bag, which I seal. Smiling, I turn back to Susan, but as I do, my eyes catch on a reflection coming from a small hole in the side of the tent, the flap not totally zipped up. What I see is… is…

...a slit reptilian eye, staring right back at me.

“WHAT THE FUCK IS THAT?!" I yell in surprise, flailing backwards!

Susan bolts upright. “What?!" she exclaims.

I point at the flap. She turns to look, but there's nothing there any more. The monster is gone.

“It was there! I saw it! I found more tracks outside earlier, there's something out there!"

Susan is still confused, and looking a bit bored now. “Well then go fight it, big strong man. Or do you need me to go? I'm like, a foot shorter than you but you're supposed to be the brave guy."

I round on her. “NO. No no no!" I shout. “Do not go outside. It wants us to separate, it wants us to go outside!" I hug her to me, eyes never leaving the hole. With one hand, I slowly reach over, and zip it all the way shut.

Susan just frowns at that. “Spencer, there is nothing outside. I'll go out, shine the flashlight around, prove it to you, you big baby." Panicking, I grab her wrist as she tries to stand up a little.

“No! Don't go out, just… let's be quiet, maybe it'll go away, we can walk home in the morning, when it's light out. Please. Just, don't go outside," I say, voice dropping to a whisper.

Facing me, she's about to say something, but I hear a slight puncture and long tearing noise that sends a deep chill of dread down my spine as she looks over my shoulder, her face slowly turning to one of horror before she shrieks.

---

He doesn't seem too happy in there. He sealed the flap, so he's probably just going to stay hiding within. Well… time to uncreate this nest.

Circling around I go to its rear. Slowly, daintily, I lower one of my scythes and press it to the fabric of the created-nest before dragging it down diagonally across. With a foreclaw, I reach into the flap and tear it down, giving me sight of the created-nest's occupants; and them, in return, of me.

The male's back is to me as he holds the female tight. She's looking over his shoulder, eyes locked on my face, mouth slowly dropping open. Gradually, that smell of 'arousal' grows. I think there's a bit of a weird coincidence here; I don't think that it's arousal.

I think that it's fear.

The female shrieks, her shrill voice ringing in my ear holes.

The male turns to face me. I lick my lips and bare my teeth. The female simply continues to scream at the sight of me. I bring my claw down further and push into the created-nest.

---

I see its face, its slitted eyes, sharp claws, hungering maw full of teeth as it licks its chops, and the first thing that fully registers to me is Susan screaming.

I pull her back from this monstrous visage, on the verge of panic, and it pushes its way in. Halfway in, its eyes never leave my face, an expression I can't understand but can only guess at. Hunger.

I reach for the zipper, but it lunges forward, planting one claw on my shoulder and pulling me to face it. It pushes me down and off of Susan, blades coming down to-

“AGGHHH!"

-puncture my shoulders!

I try to raise a fist to swing at it, but I can't, I'm pinned! Susan is screaming harder now, blocked from the flap by me and the hole by the monster's bulk. I panickedly turn my head to her.

“Help me! Hit it! Hit it!" I scream.

Showing none of her earlier bravado she shrinks back further, but grabs an empty beer can and throws it at the beast's head. It impacts, but does nothing to the thick brown plate covering its forehead, only causing it to briefly glare at her before it returns its gaze to me. It blinks. It licks its lips once more. It opens its mouth, darts forward…

And the world disappears.

---

NOMF.

Glk. Glk.

Glk.

“[HRRMMFF! SRRRSRRRN! HRRRRLP! 'IT IT! 'IT IT!]"

With his head in my maw and my teeth in his shoulders I begin to back out of the created-nest now that I have my prize; all the while the female continues to shriek and my prey spasms in pain.

He's rather strong for his size, but it means little to me. He has no claws, all he can do is scrabble at my plates and the exposed scales of my neck. Trapped as he is by my scythes and my jaws, he is helpless to stop me as I back away into the brush dragging my prey with me. The female remains within their created-nest, simply sobbing, yelling, screaming, somehow just as helpless.

Perhaps they form some sort of... I don't know, empathetic bond, and feel all that the other feels. Or she is a weak little creature unable or unwilling to defend her mate. This is why we do things the way that we do... proven strength is not just an attraction, it is a promise of mutual defense.

As I retreat, I lightly gum further on my food, attempting to pull it deeper in, but his shoulders are simply too broad. I will have to do this the old fashioned way... and with the strength he will give me, return for his mate at a later time. His nude form is muscular and toned, reminding me of an overgrown jungle trog. Unlike those ugly little creatures, he hasn't learnt not to roam the jungles in such small numbers.

After all. Predators could be out and about.

“[HRRRRRLP! HRRRRRRRLP! SRRRSRRRRN!" he continues, screaming in futility.

By now his mate's sobs have grown quiet, only the occasional shriek audible through the trees. Finally I stop, pull my scythes from his shoulders, and release him from my mouth with an audible glurk as my throat muscles cease.

He scrambles back, flailing his disabled arms in the darkness of the night as he attempts to stand. Finally, he backs himself against a tree, using his legs to push himself up as he grunts in pain. His skin is smooth and unarmored, without even fat or fur to protect him from the scraping bark.

“[Agh, shit!]" he exclaims, two guttural noises that most likely simply mean he is in pain. Breathing hard for a moment, he finally realizes the predicament he is in.

He looks up, notices my shadowed form and glowing eyes in the dark, and runs.

He promptly face-plants over a root.

“[Susan! Susan, where are you? Help!]" he calls. He keeps repeating two words: 'Susan,' and 'help.' Perhaps one is the name of his mate, perhaps the other is a word signaling distress. Whichever it is matters not, and I do not yet have enough information to figure it out. For now, I shall continue toying with my prey.

So far, he has left a bad taste in my mouth, not only from his pitiful attempts at escaping me, but also because his hair was rather greasy. Bleh. I won't bother with the head, I will simply get that part over with.

As I stalk forward he pushes himself into a sort of loping crawl with his legs, arms still disabled. I'd made a guess on where the muscles would be, but to be honest, I was going to hit something important no matter what. The scent of his blood as it flows from his wounds excites me, calling forth the spirit of the hunt.

This is a poor hunt, but... it's still a hunt. I expected to have to fend off the female as I stole this one away. He is mine.

“[Fuck, fuck, Susan! SUSAN!]" he yells, and finally, he gets a response back.

“[Spencer! Where are you?!]" she calls through the trees, giving him a direction to head. But he won't make it back, nor would there be any safety to be found.

Lazily, I dart forward and stab a scythe into one of his feet, eliciting a pained groan and spasm. I simply backpedal and tug him back, running my tongue up his exposed thigh for my second taste before releasing him again, just in time to avoid a kick from the other foot that barely misses my retreating head.

Poor form, no strength to it, simply a desperate attempt to get me away. With enough strength put in it would likely have harmed him more than it would have me.

He continues his crawling as the scent of fear and blood fill the air. I quite specifically made sure earlier that there would not be any nearby predators who may be roused and summoned to try and steal my prey. Neither did I find any more of his people. No competition for me and no salvation for he. He is mine.

The light of the created-nest is once more visible through the trees, so I grab him by the foot again, this time with my jaws. I go for the same one I had wounded so that I may taste his salty blood on my tongue. In response, he kicks back again, and as predicted it does nothing. I simply close my eyes and allow the blunt force to be dispersed by my scalp plate. I drag him back, lips wrapped around his ankle and teeth lightly digging in as well.

Back we go, back through the trees, retracing his rut in the dirt and needles. Unveil your tricks, my prey. Show me your strength, show me your strength.

“[SUSAN! I'M OVER HERE! SUSAN!]"

But he does not. All he does is weakly scream, and cry, and moan, and struggle.

What use is strength if you lack the will or ability to use it?

Softly sobbing, his struggles cease as the distant shrieks grow quiet. He seems to have accepted his position. He is mine.

“[No, no, no, no, no, no... please...]" he mutters.

I drag him to the river and, my jaws still on his leg, dunk him in. Once again he struggles and flails as the waters rush over him to strip the dirt and grime from his body; I did not go to all of this trouble to have to taste the dirt, after all.

He coughs, splurts, and splutters before speaking once more.

“[Please... Why...]"

Once my meal is properly prepared, I tug him back out onto the shore, and begin to feast.

First I bite down, severing his ankle cleanly before swallowing his foot.

“[AGH! NO! PLEASE NO!]" he shouts. He continues to scream in shock and pain, clawing his way away back towards the water he seemed so afraid of...

...But I lope forward over him and lay one foreclaw on an injured shoulder, pinning him down. Then I bend down and take hold of one his arms, shoving it in my mouth, suckling on his fleshy fingers before closing my vice, crunching through arm bone. He cries out once more, before going quiet. The pain has gotten to him, and he has passed out.

I chew, and swallow, and go back for more. It is a shame that he is too large to take whole, as I would prefer. A, long, long, long time ago, someone figured out that eating things in one piece--or at least large pieces--digests for longer. Therefore, it is better food! More efficient!

...Which is why not getting to swallow him kind of sucks. Oh well.

I simply pull his head back towards me and position my jaws over it, biting it clean off in one go before swallowing it whole. No hair, no muss, no fuss. I finish the limbs before flipping over and peeling open his torso with a scythe to get at his delectable innards. After cracking the ribs, first goes the heart; the source of strength. Then goes the liver, in all its dense goodness. The stomach comes next swallowed whole, his dinner joining my own. The lungs I take, the bones I crunch down and suckle.

I choose to leave his ropey intestines behind for the carrion feeders. I am not desperate, and they have little to offer me.

By now my belly has bloated full of food, and now, I must seek shelter to digest it. I know just where to laze. The grey skin beneath my plates has now stretched out, bringing a new color to the palette of my body. Brown plates, brown scales, red smatterings of blood, and grey skin.

Trotting back with the rut in the dirt as my guide, the light of the created-nest returns through the trees, and with it, the sound of sobbing.

I approach from the rear, to the tear I first made. Within is the female, broken down on the floor next to droplets of her mate's blood from his abduction.

I saunter in, tearing the hole larger with my expanded bulk, and curl up around her. She barely acknowledges my presence, so I hug her to my form.

Only now does she act, and it is only to blankly stare at my rounded grey gut and bloody jaws. She goes limp, and holding her close I twist my neck down. With my other foreclaw, I turn her head to look into my eyes, and I study her.

I can't fully understand the looks on these tall intruders' faces, but I can only assume it is one of sheer terror. She's been exuding that fear/arousal smell the entire time. As she looks into my eyes, I open my maw. I retract my teeth, lower my face to hers, and lick her across her face, before sealing her lover's doom once more and I begin to attempt to press my lips to hers to kiss her, which she does not struggle against.

I extend my tongue out of my mouth, and lap all over her face, drinking up her salty tears. It reminds me of the semen from her lover's penis. Correlation? Who knows. She seems lesser. Emptier. Weak. Oh well. I continue to hold her close with one foreclaw whilst idly rubbing myself with the other, able to access the unfolded skin.

She continues to lightly sob as I get comfortable and fall asleep with her held against me.

He is mine. And perhaps, she knows it.

---

When I awake many hours later, I find myself alone. Not unexpected; it would seem that the female came to her senses and fled in the night while I slept. Casting my gaze around the created-nest, I find little out of place from before except for her mate's topmost covering missing. Even her own are still here.

Perhaps not to her senses. A flight born out of animalistic fear and instincts, grabbing only what she felt true safety in? Mm. Who knows.

The taste of blood is still on my tongue, and I'm quite thirsty. I will need to get up and go to the river later. But... I don't feel like it right now. Later. I will also need to scrub the dried blood off or else it would complicate my hunting.

Belly full and satisfied, I lean back from my seated position. I bring my foreclaws up and massage the skin revealed from under the plates due to my distension. Oh, that feels good.

Normally Kin skin is inaccessible for the most part, hidden under our carapace. The skin on our fronts are also folded away beneath the top layer of skin and carapace, allowing for our expansion when we overeat. Since it's generally such a rare feeling, it's always a good one. In a few days once the male is processed, I'll repeat this with his mate.

Hmm. Mates. I idly scratch at my belly. I absolutely want one now after learning what I have. But what if I combine the pleasure of a full belly with the pleasure of this almost-mating I have been taught?

Slowly with my other foreclaw, I reach down to my slit once more, but I can't reach it around my bulging gut while lying down; my forelegs aren't long enough. I guess I'll have to sit up for this.

I begin to probe and pry as I did yesterday, revealing it. I rub, and rub, but I want more. I'm already so full, but I need more in me, even just a little. The teasing isn't enough.

“Haaagh..."

Exhaling from the pleasure, I sink a digit in, my passage still just as tight. Very, very slowly I insert it in, and out, rubbing around, in, and out, rubbing around. The inside is very slightly ridged by my tight muscles, and just pressing a little bit in requires light effort.

Rub. Rub. Rub.

Shlk. Shlk. Shlk.

“Haaaaaggghhh."

So good.

Feeling adventurous, I pull my claw away, rub up, and down once more, before returning my digit to its home, with a friend, slightly stretching myself open more. This isn't even close to the pleasure I would feel if I just had a mate, but it is already heavenly.

My heat is approaching in a few months. I doubt I will be home by then, but perhaps there are other Kin out there? I already passed the previous few years by, irritable and unsatisfied, unaware of what I could have.

In, out, around, in, out, around. Yes. I begin to vibrate my voicebox subconsciously, purring in pleasure.

I'm still massaging my distended belly with my other claw, it hanging out over my entrance, preventing me from seeing it, even with my nascent longer neck of a female. My crop should begin to grow in soon, actually; I've noticed my neck lengthening a bit more in preparation.

Reaching up from my belly, I run my claws over my neck, prying a little at the plates at its base. Yes, definitely a little looser. Curiosity sated, I continue my rubbings.

I can feel… something… building, down there. My mind feels light-headed. I can't help but pant, it's a good thing I didn't do this again earlier and give myself away. I don't even want to try and control it, I want to bask in this new-found pleasure.

Ever-mindful of my claws, I carefully pick up the pace, in and out, all around, in and out, all around, toying with my delicate insides as my other not-so-delicates prepare to ramp up their work.

Perhaps if I had some sort of object, this would be easier… but it would be less precise. I can press down on specific parts of my sex, the pressure feeling great. Swirling my fingers, I can really feel that other pressure mounting. My canal has become very lubricated by now, the tight muscles also deciding to loosen a bit on the understanding that it is time to do so.

“Heeeeeeeeegggghhh..."

Rub, rub, rub.

Shlk, shlk, shlk.

“HAAaaaaaghhh!"

Finally, it hits me, pushed over the edge, I suddenly feel the best I have ever felt, like my body has rewarded me for some great deed! I feel alive! I keep rubbing at my belly, aaalll over, working the tips of my fingers into the skin.

The sensations I create with my fingers begin to change, peaking. I maintain this for a while, before I collapse, completely exhausted. Pulling my foreclaw from myself, I lie back, and lay it on my stomach to help rub as well.

For the first time since I arrived here, I find myself fully satisfied, content, and at peace. Happy.

---

A/N:

So it begins. One down, two to go. Despite being a story with 'eat people' elements involved it's nine chapters in before there's actually anything close to that. And it's not even really 'vore,' it's just 'eat guy.' On that note, I believe in plot over porn when it comes to longform stuff like this; I've built everything to minimize contrivances and explain it as best I can, plausibly. You could enjoy the writing and plot itself without being a vorarephile here to see people getting eaten by an inhuman alien monster, although unless you're okay with the disturbing themes, you probably won't enjoy it very much.

This is an absolute monster of a chapter, being two-thirds longer than the average. The final scene was originally part of the next one, but I ultimately decided to move it here so that the content warning-requiring parts are more unified.

This chapter is actually a bit sparse of 'true' pornographic content to be honest--unless you're into gore, and I would not be surprised if at least one person who reads this is and likes that chapter 'in that way.' Anyway, not only is this and the previous chapter the first sex scene I've ever written, it didn't have a lot going for it, and thus I wouldn't really consider this to be an actual true sex scene content-wise. The next is coming up in chapter 12 and while it's only about a few hundred words more it's a lot more packed with content.

Anyway, that aside, Isn't it funny to think how what happened to Spencer is significantly more disturbing from an outside perspective than if she was large enough to swallow him whole and yet the vore is considered 'worse' by many content-wise? I mean, one's asphyxiating after being eaten alive, the other is being literally eaten alive in pieces. Different forms of horrible.

Fun fact. The Kin, as mentioned, like to eat things whole, citing it being 'more efficient.'

This is not actually true. Due to the decrease in surface area compared to balls of chewed-up food--individually known as a bolus--it takes longer for stomach acid and digestive enzymes to break down the food, which is also made harder due to the intact skin. The only efficiency gained is in getting all of the blood. The Kin are tribals. They don't understand how these things work. They think that 'food in belly longer = better food.' It's a social development that came out of their desire to eat a lot, and ability to eat a lot in one piece.

You can't expect pre-neolithics to know the scientific method and how exactly a stomach breaks down food. All they know is that things in their bellies just melt and they get fed--and if they overeat, they get bigger. Thus, eating a lot means growing a lot, so eating a lot at once means growing a lot at once. Normally, when not gorging, they would take care of their nutritional needs, but by overeating, the excess goes directly into growth. Ironically, if they did chew their food but ate as much, they would grow faster. This is information that will literally never come up within the context of the story, so I'm just going to explain it here.