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This is the second encounter with the Colossal Bears. In this episode an intern Bioengineer has to assist with the implantation of embryos into a female Colossal Bear. The result is a nasty story with full-body insertion, too much semen, and a flood of bear piss. If that doesn’t appeal, please to move along and read Hairy Potter instead. Otherwise, enjoy meeting another Colossal Bear.

Ideally I’d be at home soaking in a warm bath, listening to a soothing audio-stream, slightly buzzed from alcohol with the taste of beer still on my tongue while the winter storm tantrummed against the windows.

Regrettably instead I was standing naked on a scaffold out in the storm hugging myself against impending frozen death. The South end of a Colossal Bear was a nearby wall of fur radiating blissful, life-saving warmth. Half standard gravity of this planet allowed the monsters to grow to, well, colossal size. This female was a giant among giants, standing seven metres tall at the vulva and weighing near 100 tonnes.

A biologist shaved my head and another slathered cold lubricating gel over my body. “I di-di-didn’t v-volunteer for th-this,” I complained through chattering teeth.

“Your Team Manager says you did.” An officious pratt with a datapad and bulky jacket loomed nearby. “Be proud, son. You’re about to save not just a species but an entire ecosystem!”

“B-b-but why n-not use a rrrrrrobot.” I was shaking so hard I could barely stand. The gel seemed to leech the heat from my body as though I were packed in ice. It seemed my balls had retreated to somewhere near my kidneys to avoid the cold and my dick had probably fallen off.

The biologist smearing gooey slime over my naked flesh explained, “The Colossal Bear is highly allergic to polyplas. We don’t have time to fabricate carboncomp forceps and our window for viable implantation is rapidly closing. We have about twenty minutes before this entire project fails. Breathe in through your mouth now.” He jabbed something like an asthma inhaler between my chattering jaws and pressed the activator. Acrid mist whooshed into my throat and lungs.

I would have bent over to cough and retch but my head was held by the other biologist as he poked a coms bud deep into each of my ears. Then he forced a nasal plug so far up each of my nostrils I thought they’d scratch my brain. Lubricating gel sealed the devices into my head. I was profoundly uncomfortable.

“Check… check… Can you hear this?” A disembodied voice spoke in my head. I nodded, shivering uncontrollably. “Answer me, boy. Don’t open your mouth, subvocalize in your throat. The AI will sort out what you mean.” The officious pratt was speaking into his datapad.

“I th-th-think I’m d-dying of hypothermia.”

“Excellent. Don’t panic – soon you’ll be toasty and warm and saving the planet. WHERE THE FUCK ARE THE ZYGOTES!” he harried another biologist. A dishevelled subordinate in too-big white overalls wrestled an ominous box festooned with biohazard symbols. “Right, get Dildo,” he waved at me, “up the ladder and let’s get the fucking Fucking over and done with.”

I would have retorted angrily that my name was Eric, not Dildo, but my jaw muscles had seized from the cold. The biologists man-handled me up the scafolding until was face-to-fanny with The Orifice. I was about to be shoved head-first into the cunt of a monster. The terrifying flesh moved and flexed, but the heat flowing in waves seemed a better alternative than dying in the blizzard.

“Soldier, listen very carefully.” That voice inside my head. “The Colossal Bear is sedated and in full oestrus. The biologists have been feeding her drugs for weeks to dilate her vagina and cervix. You will be absolutely fine – there’s enough room in there for two of you. As soon as you’re given the zygote sac wrap both hands around it to protect it from the wind. Push your arms into the vagina. The biologists will lift you and push you forward. You will be pushed until you are entirely inserted into the vaginal passage. Your hands will feel a constriction, like a donut of muscle. That is her cervix. Push your arms through as far as you can then use your fingers to tear the membrane surrounding the zygote sac. Once you drop the sac, let us know you’re done, and we’ll pull you out. The whole thing will take less than five, toasty-warm minutes.” The man in the bulky and very cozy jacket stood a safe distance away, out of the wind.

“W-wont I, like, d-die of asphyxiation?” My face muscles had thawed slightly in the hot proximity of Colossal Bear vulva. I was staring at three giant, pink pillows of flesh snuggling together to make a ‘Y’ shape. Clear fluid dribbled in strings from the cavity.

“Close your mouth, breath through your nose. Ever done ocean SCUBA diving?” I shook my head (more than the rest of my body was shaking), “Well… never mind - you’ll manage. Your lungs have been coated in nano-filament processors that strip down fats in your blood to make oxygen. The by-product is alcohol. The nose filters compress and re-process your breath. You’re a living rebreather. It’ll feel like you’re breathing normally through your nose. If you breathe through your mouth then, yes, you’ll die. So don’t do that. And if you’re submerged more than two hours you’ll die drunk and skinny, so don’t do that either.” He spoke to an aside, “Right, give Dildo the zygotes and fuck him up.”

The aide hoisted the biohazard crate over his head, presenting it to me up the ladder. The top hissed open with a cascade of fog revealing a fleshy, baseball-sized globe packed in ice. I reached down and fumbled with the blob with clumsy hands. Somehow the ice around the blob felt warmer than my fingers. I wrapped my other hand around the yielding ball of cells and raised the zygotes toward the centre of the Y-shaped vulva.

It felt as though scalding water had been poured over my hands when my two fists penetrated the gap between wet pillows of vulva. I hissed with the pain. Normal body temperature of the bear felt like a burn against my chilled fingers. And at the same time the rear end of the Colossal Bear lurched. Okay, she really doesn’t like cold hands!

“Get that monster under control, you fuckers! No, we cant use tranqs because they’ll harm the embryos.” The voice in my head was shouting orders to a swarm of panicked animal handlers. “That’s your fucking job – you work out how to keep her calm!”

For a moment I thought my precarious perch on the scaffold would fail and I’d fall several metres onto hard ice. But the giant beast settled, or the handlers wrangled it more securely.

The briefing had been… brief. Humans landed here and promptly screwed up the ecology through ignorance. Most of the wildlife on this planet was deathly allergic to our entire technology. One important species of Colossal Cat had been wiped out which was causing destabilization of other biomes. The bioengineers said we could save the big cats by gestating a litter of their cloned zygotes in a big bear. The two species were close enough in evolutionary terms to make only very minor engineering tweaks necessary for the pregnancy to hold. Zygotes were cloned, an oestrous bear was found, and some idiot coated in slime would implant the embryos by hand.

As I was the interning bioengineer I was the chosen idiot, head-deep in bear-twat and being shoved awkwardly deeper. The biologists were finding it tricky to manoeuvre a naked, greased intern. Heat of the bear scalded my frozen limbs.

It’s hard to convey the mixed emotions I was feeling here. On the one hand, I was in absolute terror at being engulfed by angry bear vagina. On the other hand I was saving the planet. And on the third hand the blessed warmth of the bear might keep me from dying of hypothermia.

My hands were stretched ahead of me as though I were literally diving in. When I was chest-deep the walls started undulating - peristalsis muscles gripped my body to pull me deeper. I slipped easily forward, aided by the sucking motion of the bear’s muscles until I was hip-deep. For a moment I panicked for breath before realizing I could easily breathe through my nose. Of course I couldn’t see anything, and kept my eyes tightly squeezed shut. Another ripple of the fleshy walls aided the biologists outside until just my bare feet remained exposed to the cold wind.

And then I was entirely engulfed.

Panic seemed ever present – hovering near my mind. What if I get stuck, what if I die, what if I cant implant the embryos, what would my mother think?

Everything lurched. Around me the walls squeezed hard. I was abruptly pulled forward until my wrists were wedged through a constriction of flesh. But at the same time I was buffeted up and down, left and right. Voices in my head shouted in alarm – a confused cacophony of mixed sentence-fragments.

I shouted into my coms, “What’s happening? What’s going on?” the voice-processor removed the terror from my voice, “I think I’m at the cervix, ready to implant. Do I go ahead?” The vaginal walls were still pummelling me up and down.

“EVERYONE CALM THE FUCK DOWN!” the voice of authority cleared the channel, “Okay son, we have a bit of a problem here. The Bear has broken free of its restraints and has escaped the compound. You’re in no danger, probably. Stay on mission. Implant the embryos while we re-capture the bear and rescue you. Your highest priority right now is complete the implantation.”

There was another burst of confused chatter – I thought I heard someone say “… another bear…” in the background.

Stay on mission. Rip open the encapsulating sac and release the zygotes. Save the planet. Ignore impending death. I can do this.

My world had calmed somewhat. Perhaps my abductor had stopped lumbering away from the camp. At least I was not being buffeted in the claustrophobic tunnel for now.

Ripping the membrane of the sac with my fingers proved difficult. With my arms forward I had no leverage and slick ball threated to escape my hands. Perhaps if I could get my elbows through the cervix… I’d have better leverage and would be able to tear the enclosing skin. There was exactly zero purchase to be had with my lubricated feet and legs against the slick walls pressed around me. So I flopped my body awkwardly like a walrus navigating a steep beach. Slapping my groin repeatedly into yielding warmth gave me an embarrassing hardon. A hysterical voice in my mind kept repeating, You’re fucking a bear. You’re fucking a bear… Over and over.

My elbows eventually squeezed through the constricted ring of cervix. With the added leverage I tore through the thin protective sac of eggs and slapped the oozing contents against the bear’s uterus wall. The bioengineers assured me the cells would be drawn higher by natural processes and science but I had already been ignoring most of what they’d said.

I muttered in my throat, “Okay, sac torn, zygotes implanted, can someone get me the hell out?”

“Stay calm, soldier. There’s a small complication. Another bear is in the area and we cant approach until it leaves.” Despite the hot flesh around me I felt suddenly cold. The Pratt continued, “You stay put for now and we’ll get to you in a jiffy.”

Stay put. Trapped, wedged into the cervix of a Colossal Bear, while another Bear patrolled nearby. You’re fucking a bear, you’re fucking a bear… Insanity hovered perilously close to the giggling hysteria in my mind.

My world lurched again and I heard a muffled thump through the walls of flesh. Perhaps this is my rescue!

It wasn’t my rescue.

When something momentarily pressed against the soles of my feet I thought the rescuers were trying to free me. But the something withdrew, and then pressed again, and withdrew.

A voice screeched in my ears, “Watch out! The other bear is trying to…” But I missed hearing completion of that sentence because a giant cock slammed between my legs and mashed into my balls.

The penis of a Colossal bear is almost two metres long and has a diameter of more than 400 millimetres. A supporting bone, called a baculum, keeps the penis rigid during penetration. In physiology the genitalia of Colossal Bears is more similar to Earth’s canines than ursines. Like canines the male Colossal Bear has a bulbous swelling at the base of his penis which locks him into his mate to assist fertilization. My mind had a moment to present a brief recap of the local biology encyclopaedia.

When the bear’s penis withdrew momentarily I tried to draw my knees upward to protect my balls somewhat. I was still lying face down so I hoped I could bring my knees forward. But the gentle pressure of the vaginal passage was more than I could overcome. The next thrust slid behind my legs and pounded my buttocks. I was jammed forward – my shoulders and torso forced through the female’s cervix. But my bent knees kept me lodged behind the tight constriction.

Successive pounding from the tapered end of the male’s penis hammered my buttocks. Allow me to assure the gentle reader there was absolutely no possibility of the tree-trunk-sized cock penetrating me. And as I’m here reporting the events, you can be assured I managed to keep breathing through my nose even in my panicked state inside a completely dark, constricted tunnel while a giant cock pummelled my butt.

After what seemed forever but was probably less than ten seconds the pummelling stopped. My upper body was wedged inside the uterus of the Colossal Bear while my hips and legs remained in her vagina, sharing the constricted space with two metres of bear cock.

A high-pressure firehose of hot bear semen jetted directly against my sphincter. The tapered tip of the bear’s penis was pressed hard against my butt with the opening to his urethra directly aligned with my butthole. Naturally I reflexively clenched my sphincter tight against the intruding flow of liquid. And that worked… for a short while.

Alcohol is the by-product of extracting O2 from lipids and it is a powerful muscle relaxant. My rebreather’s waste-product was slowly getting me drunk… and relaxed. So for the first couple of minutes I managed to keep my sphincter tightly sealed against the powerful jets of liquid. But really, you can only clench for so long. And with the effects of the alcohol dissolving my resolve eventually my fatigued muscles gave way. I had to relax clenching for a moment. The semen-rich portion of the Colossal Bear’s ejaculate hosed straight past the collapsed defences of my sphincter and about a litre of gooey bear cum flooded into my bowels.

The quantity of bear ejaculate was enormous. What wasn’t forced past my sphincter flooded around my body. Like a cork, my body was blocking the semen from jetting into the bear’s uterus. Litres of hot bear cum flowed over me, around me, and into me past my abused sphincter.

Each throb of the bear’s cock pressed my own genitals against the warm donut of the cervix. Rhythmic pressure along my cock combined with the internal sensations of hot bear cum sloshing into my bowels…. Intensified by the effects on my alcohol-addled brain…

I shuddered with an unexpected orgasm, squeezing my own cum into the clenching wet darkness.

The tip of the penis mashed against my buttocks pulsed. Each time I thought I was so full of bear cum there was simply no room for any more something internally would shift. Pressure of the liquid found some channel past a convolution of my intestines and more goo flowed into me. The building discomfort of pressure would be momentarily relieved as I felt the hot bear cum course ever deeper inside me.

Time was gone to me – I was floating in a lightless, wet, clenching world being pumped full of bear semen until my guts were bloated. Every so often sensation would overwhelm me and I’d shudder into another orgasm. All the while I had to discipline myself to keep breathing through my nose, not to panic, to stay alive. My legs had gone numb from the pressure of bear cock against them.

Some interminable time later awareness dawned that the rhythmic throbbing of the cock against my buttocks had reduced. Less and less was I being mashed up against the constricted cervix.

At the same time as the tree-trunk of bear cock withdrew, the orientation of my world tilted. Instead of laying flat my feet tipped downward. The constriction around my torso loosened enough that I slid easily free from the cervix. But there was exactly zero purchase for me to halt or even slow my sliding down the steep incline. Thick bear semen was all around me lubricating the vaginal walls. My limbs were too slick with mucous and fluids for any purchase.

As I felt cold air touch my feet, knees, thighs, hips in my mind I could see myself plunging seven metres onto sharp rocks. I panicked, shouting out in dismay. Fortunately the female Colossal Bear was squatting, so my fall to the ground was less than a metre. I impacted into a snow-filled depression. My numbed legs gave way and I slumped backward, laying face-upward in the cold.

Unfortunately in my panicked shouting I gulped down several mouthfuls of the male’s semen as I was ejected. Sweet-salty taste like brie cheese filled my mouth. And more unfortunately the reason the female bear was squatting was to urinate after her mating. The brightness of free air blurred the hindquarters of the bear above me. A waterfall of bear urine splashed over my head to mix with bear semen, my semen and other fluids in a messy pool around me on the ground. Pink vulva a metre above my face was all I could see while golden liquid flowed over my face. My natural reaction was to gasp at the fresh air, but instead got a mouthful of acrid bear piss. The flavour of brie washed away by a taste somewhere between strong, unsweetened tea and burnt popcorn.

Grey daylight returned for a moment as the looming cliff of the female bear’s posterior departed with the completion of her eliminations. Cold air flurried snow over my exposed face and cum-bloated abdomen and genitals. I stared up at the murky clouds until my view was taken up by a metre wide black nose. Hot breath snuffled above me for a moment. My brain was numbed – I knew I was in imminent danger from the mouth beneath that nose devouring me in one gulp.

But the nose withdrew. Relief was short-lived as the sky darkened again. The furry underbelly of the male Colossal Bear lumbering above me. I knew it the male as evidenced by the great furry tube of his sheath suspended below his belly and by a scrotum the size of a small car hanging behind.

I had no energy left to move – I lay drained of will and strength in a cooling puddle of piss and semen. Yet I marvelled at the majestic swaying of those balls high in the air above me. Such a potent beast, and I was full of the contents of those balls from both ends. Perhaps the great bear was about to crush me with a paw. Perhaps these were my last moments. The swing of a furry sack high in the air would be my last sight. So entranced was I by the motion of his balls I didn’t realize the bear had paused to raise one back paw. Hot, yellow liquid arced down from the sky in a torrent. The male bear was marking his territory where the female had pissed. He was laying claim to what he mistakenly presumed would be his future cubs from their mating.

The stream of bear piss hosed over my head and down my chest. For an indecent time it hosed against my exposed cock and balls. I mistakenly gasped in surprise. My brain took a few moments to remember to breathe through my nose and I reflexively gulped down liquid while struggling for air. The puddle around me deepened considerably to become a small lake as the flow seemed never-ending.

Lighter grey returned to the sky as the male bear lumbered away to follow the female. Snow flurried from the sky, settling on my exposed flesh. Somehow I was still alive, practically unscathed. Voices in my head faded to a stream of assurances and advice for staying alive. I sank beneath the cooling surface of the pool of urine to the warmer depths, trusting my rebreather for a while longer.

I was soaking in a warm bath, listening to the soothing audio-stream, slightly buzzed from alcohol with the taste of bear still on my tongue while the winter storm raged. It would do.