The brown dung-dragon turned to face the camera and gave a winning smile.

"Hello, and welcome to part 2 of 'How Scathros are Made!' I'd forgotten we had a commercial break there. I'm your host, Julia, and this here..."  She leaned over, patting the belly of a bloated and whimpering rabbit, strapped to a medical gurney. "Is Dylan! Last time I showed the process of impregnation, and how a scathro can implant a 'seed' into the bowels of a host, that will swell and grow into wonderful new life! Dylan's got a very fun two weeks ahead of him."

She wheeled him off stage. "But you don't want to wait two weeks to see what happens." Julia paused and then leaned towards the camera and said in a whisper. "Do we know when part two will be aired?"

She listened a moment then pulled back. "Well, even if you have to wait a few weeks to find the answer, I've only got the studio for one day, so we can't use Dylan for this! Instead, here's one I prepared earlier!"

Julia strode to the other side of the stage and pulled out a cream-and-coffee coloured rabbit, strapped to a different gurney, gagged and blindfolded.

"Gotta be careful, that belly is almost as big as she is!" Julia held a hand against the enormous wobbling mass. The rabbit squirmed and whimpered behind her gag. "Betty here has been my sub-in-training for a while now, and this is something of a final test for her. She's doing so well~"

Julia gave the rabbit an affectionate stroke on the head. "But! Here's a question for you. Given that Betty has both a uterus and an anus, where do you think the scathro would grow?"

She wheeled the gurney around, using the straps to spread the rabbit's trembling legs. The camera zoomed in on the rabbit's gushing pink pussy and the stem of a plug stuck in her butt.

"In this case, I've impregnated her anus. She's being anal-trained and this could be seen as a final test of sorts. But! Either hole is a viable option, or both if the scathro is really eager to spread! Uterine scathros will need more dung added during their growth phase. The parent will usually keep them close by, take regular thick shits into their pussy. It's not unknown for the seedbeds to get wholly addicted to the feeling of being used as a toilet, thanks to the shared pleasure from the growing life."

Julia casually fingered the rabbit's snatch as she talked, setting Betty squirming and bucking against the table. The rabbit's belly trembled and jostled, adding to her overwhelming pleasure.

"It is also possible to nourish and grow a scathro post-birth. That can lead to a more gentle experience overall. Bu-u-ut, that's not what we're going for here, is it~?"

Julia grinned wickedly as she buried her hand deep into the bunny's snatch, losing it up to the wrist in her pink folds. The bound rabbit went wild, clenching and flexing, a little manic spit frothing at the corners of her gagged mouth.

"Now, I'm not teasing this bun-bun just for the fun of it, although it is very fun~" Julia kept one hand in the rabbit's cunny while the other ran across her chest, massaging and squeezing her breasts. "But, in moments of extreme arousal, the growing scathro inside will try to birth itself!"

The rabbit's belly was jostling and squirming harder and harder. It began to squeeze down, showing a taut tightness, the surface as firm as a cannonball on a bulge half as large as Julia herself. The sprayed pussy-juice across the gurney. Julia carefully angled her down to avoid splashing the camera.

"Now, this plug isn't necessary by any means. Nor is it effective if the scathro inside pushed its way out. A growing scathro will keep itself locked comfortably inside the hosts bowels, and will resist any but the most extreme measures to remove it. Likewise, when it wants to come out..."

Julia grinned as the rabbit's tailhole flexed, bulging out and spreading over a plug bigger than Julia's head.

"...nothing will stand in its way~"

The plug, dripping with anal juices, dropped to the floor with a clang. A loud, rancid [i]pfffblllrrrrrpppprrrrrpptttt[/i] leaked out of the rabbit's hole, spraying anal juices and gas over the table.

"Here we go!"

Betty's asshole bulged out, a brown tip crowning against the hole. It stretched wide and kept on stretching as the tip resolved into a head, long ears pressed to the side of its head, eyes shut and muzzle closed as pushed out. The rabbit's body thrashed against her restraints as a pair of broad shoulders, sculpted out of firm poop, spread her out. A chiselled, flat chest came next.

"Don't worry!" Julia said, speaking loudly over the rabbit's squealing. "She's really enjoying this!"

She pointed to the rabbit's pussy, clenching and squirting with each inch that slid out of her. The brown body was drenched with her pleasure as a pair of hips slid out. With the widest point now passed, the legs slid easily out, followed by a pair of broad bunny paws.

"You've done such a good job!" Julia kissed the trembling rabbit on the forehead, then admired her gape. "Now lets meet our new friend!"

Julia patted the rabbit, who burbled in her semi-conscious stupor. She picked up the camera and tilted it down to show the figure, laying on its back, brown flesh soaked with Betty's anal and pussy juices. 

"Let's see what we have hear." The scat-dragon examined the figure with interest. "Lapin details, morphologically tends towards male. Large frame, broad shoulders, well-endowed!" She grinned, taking in the new scathros hefty rod. 

"You might be wondering, where do these details come from? If I'm the 'father', does that mean it takes on some of my traits?"

Julia set the camera back on its stand and went back to her chalkboard, starting her explanation over the trembling, twitching figure.

"This is partly true. What mostly influences the form of a new scathro is based on fantasies that the seedbed had while it was being carried to term. We can see here that Betty was dreaming of being fucked by some buff bunny studs! She's got good taste~"

Julia winked, turning back to the blackboard and starting to sketch out a diagram. As her back was turned, the scat-bunny got to its feet, blinking and looking about. 

"The reason for this stems from wild scathro behaviour. If the scathro parent isn't available, then the offspring will usually re-impregnate the mother right after its birth. This is a scathro horde would typically appear from just one victim, and they'll all usually share similar bodies!"

The scat rabbit stepped into the shadows while the dragon turned, showing a sketch of a female body and some rough dragonoid figures. 

"Mentally, it is a different matter." The dragon continued, oblivious to the figure creeping silently around her.  "The newly formed scathro has a store of knowledge formed from a combination of both partner's memories. It isn't a perfect joining, but it will often share aptitudes from both parents, and have a useful store of memories to draw on. This means that after a brief adjustment period the scathro will be able to-"

She stopped as a large paw landed on her shoulder.

"Oh!"

The rabbit was behind her, his breath coming in steaming pants as his cock grew hard between his legs. Julia bit her lip as she eyed it, feeling it pressing up between her plump cheeks. The next moment the rabbit thrust his hips forward, stuffing himself deep into the dragon's asshole.

"Ooooh~!"

The dragon let out a long, lusty moan, her mouth gaping open with animalistic pleasure. The bulky bunny gripped her around the neck as he impaled her asshole on his cock. Julia's dignified teaching demeanour was gone in an instant, her body reduced to a ball of lust. She panted and ground her hips back against her vigorous lover, letting him use her like a sex-toy. 

"Yoooouuuuu seeeee whaaaaaat I meeeeaaaaan!" She moaned out between squeals and gasps. "Heeee alreeeeeaaaaady knooooooows juuuuust hoooooow tooooo FUUUUUUUCK meeeeee!"

She bit her lip as her bunny lover hilted hard inside her. Her cock jumped, spurting her thick brown spunk all across the blackboard. Her face pressed hard against her growing puddle, her mouth slack, tongue lolling out with delight. 

She slid to the floor as the rabbit pulled his cock free, exposing her gaping asshole to the camera. It sputtered for a moment, then puckered with a tight [b]PHLBLLLRRRPT[/b] that blew sloppy brown cum onto the floor. 

After a few moments of desperate panting she rolled onto her side and blinked dazedly at the camera. 

"A-All scathros are born with certain instincts..." She mumbled, just before the scat-rabbit sat down hard on her face.

There was a gurgling from his guts. he tensed his arms and balled his fists as he pushed down. Julia's toes flexed as her throat bulged out, her stomach swelling with the ocean of firm scat suddenly forced down into it. 

Her own asshole puckered as her bowels were packed from the top. Her stomach swelled, reaching a peak where her asshole stretched as far as it would go. The, she erupted, spilling a sloppy brown log from her asshole, still coated with the rabbit's dark, syrupy cum. Her own dick twitched and came again, drenching the growing pile with her pleasure. 

For minutes, the rabbit focused on nothing but pushing, pumping log after log down the scat-dragon's eager gullet. Julia had given her body entirely to her primal urges, jerking her cock while she gulped down his shit, her bowels spluttering out sloppy muck, compacted and pressed by his shit-cock.

Minutes later, he finished. When he stood up, he left a bloated, intensely satisfied dragon beneath him.

The fresh scents of passion called himm, and he walked over to the gurney where his 'mother' was restrained. 

"Scathros are quite rowdy. They can fuck and shit for hours!" Julia burbled, pulling herself unsteadily to her feet. "Their most common partners will be their parents or siblings. It is not unknown for a scathro birth orgy to last weeks- EEP!"

She squeaked as the burly bunny picked her up and tossed her on the gurney, on top of the restrained, wriggling rabbit. He pulled the gag out of his mother's mouth and pressed her face to the dragons. Their maws met in a deep, eager kiss. The rabbit moaned as he lined his fearsome scat-cock with the asshole he'd come from, keeping Julia satisfied with a thumb pressed hard into his shit-slick anus. 

Julia broke the kiss and turned a lust-drunk smile to the camera. "It seems I'll be a little- [i]hmm[/i]- tied up taking care of this [i]big[/i] boy! I hope you've learned a little about what scathros are and how-" 

Her voice broke into a delighted squeal as the burly scat-partner furiously fingered her asshole. He thrust into the rabbit's gaped ass, setting the the gurney shaking beneath them. 

The only sounds left were three sets of lustful panting, lasting until the camera faded to black.