Stephen sighed, panting and fanning himself and stretching back on the couch.. The AC was broken and he had chosen to stay at home to meet with the repairman while his roommate was off at work, where he should be as well. But someone had to stay, and also to keep their dog Toby from being too much of a nuisance. He had already untucked and unbuttoned his shirt to try and keep cool.. He turned his head  at the whine from the german shepherd, who hopped up on the couch, panting hotly and tried laying across his lap.

"Dammit.. Toby, I'm hot too.. get off.." He griped, thumping the dog on the flank firmly, then pushing when the dog didn't budge.. "Stupid dog.." He grumbled as the dog finally moved, tumbling back to the floor, rolling over on his back, presenting his belly with paws curled.. And it was the strangest thing, the dog somehow seemed to get off on being pushed around and roughed up, his sheath once again swollen and showing several inches of flesh. Stephen snickered and shook his head at the sight, spurring the dog in the side again with his toes, making the shepherd squirm and stir, slipping further out, "Weird dog.."

Toby eventually wriggled and sat up, dipping his head and starting to lick and clean at himself, half-swollen erection and all, then resuming his heated panting in the summer heat filling the apartment. Stephen wrinkled his nose and sniffed, "What's.. that smell.." he panted out under his breath, looking around. The fan was running but doing little save circulating the warm air in the room.. now tinged with the dog's musk. He blushed softly, reaching down and rubbing the sudden, unbidden erection straining in his jeans, which brought Toby's attention.. The dog stopped in his grooming, getting up and trotting to one of his masters, sniffing there between the legs, looking up curiously at the human.

"G..go away.. dumb dog.. y-you can't help me.." He stammered slightly, that smell stronger, making his head swim in the heat, his erection throbbing, begging for attention.. He weakly kicked at the dog, while thumbing his button loose, fly quickly coming down.. A hand fished into his underwear, accompanied with a groan as he grasped at his hard-on.. Moaning aloud as he felt a warm, slimy swipe of Toby's tongue across the head of his penis, the dog nosing back in and worming the flesh down into the source of his curiosity. "T-Toby.." He just murmured, slowly dawning on the fact that he was smelling his pet shepherd.. and that it was making him aroused..

He swallowed a lump in his throat as the weight of that gradually settled upon him, eyes watching his dog intently while hands worked on autopilot, slowly tugging and stroking at his cock, pulling his underwear down and tucking them behind his balls.. Moaning openly as the dog greeted him with more warm, slightly rough licks.. Watching his dog shift and prance slightly in place.. then seeing that swollen, drooling canine shaft.. licking his lips with a rising blush, \*what would it taste like.. he's tasting me..\* "N..no.. I can't.. that's.. wrrrong.." He droned, even as he sank from the couch to the floor, slowly inching his pants and boxers down.

The alsatian wagged his tail steadily, continuing to lap at the achingly stiff member, pausing to nuzzle and pant into Stephen's face, his breath warm and meaty, and tinged with that wonderful, curious musk.. His ears perked, curious eyes watching as he backed up slightly, shifting about on his forepaws.. Nose twitching as he nuzzled along the human's side, sniffing and letting his cool, damp nosepad brush against the human's bare side and hip, before diving back down to curl his tongue halfway around the bobbing, stiff prick.

"T-ohhhh…Toby.." \*just a taste\* He panted out and crawled forward slowly, shaking, his heart pounding, hammering in his throat and ears, inching down.. Reaching a trembling hand up to grasp at the canine shaft.. Whimpering at how hot it felt, stiff and thick.. not totally different from his in some respects, but the tapered head, the colour, were all so alien.. He gasped softly and leaned closer, closing his eyes, tongue slipping out and touching to the animal flesh. He immediately pulled back when Toby growled and gave a buck forward, though his blush returned in full as he also caught a runny spurt of pre-cum across his cheek, reeking of musk.. His head swimming up this close to the dog and the source of the scent.

Toby, for his part, didn't seem to mind all that much, tail wagging steadily, panting openly with a broad canine grin framed by his dangling tongue.. He wriggled in Stephen's grip and tried pushing forward, before rearing and planting his paws down on the clothed shoulders and back.

Stephen groaned in response to that, face flushed and dripping with a bit of Toby's juice mixing with his beads of sweat. \*another taste more taste\* He shuddered and felt himself acting almost on autopilot, he had never considered doing anything like this, ever, before.. But as his lips slowly closed around the shepherd's member and he carefully went down, he was rewarded with another small flood of runny juice over his tongue, and something about it made everything \*alright good more\*.

He felt Toby's paws dig down and curl against his body, holding and bucking forward.. The dog's growl filling his ears, musk filling his nose, and furry groin encompassing all he could see.. Fur and claws touching him all over.. He was really sucking off his dog.. or.. \*fucking me muzzle\* He blinked, a shudder delayed, slowly rolling down his back at the thought.. something wrong about that, but he was having trouble thinking clearly.. Soon distracted and brought back to his task as the dog thrust and inched forward on his hindpaws, pressing deeper into that wet maw.

He squirmed, his erection aching, feeling so stiff and swollen, but he was having enough trouble keeping focused and supporting the dog's weight under the influence of that heavy musk, that he had to finish before he could tend to himself at this point. He felt the dog's paws shift again to re-grip around him, his breathing growing ragged, deeper, slightly faster.. Hearing the dog's continued low growls and whines and whimpers, barks and whiffing.. both human and dog very hot and worked up in the apartment..

Toby groaned and arched his back, stretching and adjusting again as he flexed his paws fore and rear, licking his chops and shuddering at the occasional brush of fang against his member. He hooked his paws at Stephen's shirt, tugging it occasionally upwards along the human's torso, nose twitching and wrinkling at the scent of dog filling the room.

Stephen whimpered under his breath, swallowing each mouthful of watery juice as it fills up, panting harder at how hot he'd become, not thinking about anything more than this dog as his tongue slid out, thin and flexible, caressing the base of the dog's sheath and the now-exposed knot. Enjoying the feel of hair against his tongue, the smell of strong, dominant male filling his flaring, wriggling nose.. Digits curling and digging nails into the carpet below, wriggling his hips slowly from side to side at the growing itchiness the old shag brought him.

Toby arched his back and groaned, shifting on his feet again, grinding forward into that hot, wet muzzle, flexing his paws and shifting them down Stephen's body, gripping down near the hips.. Panting and grinning as he felt fur brushing against his skin, stroking and caressing it lightly, panting and champing his jaw a few times.. While Stephen continued to wriggle and squirm, sprouting tail wagging.. He whined around his muzzleful of cock, something seemed wr \*suck lick good taste good smell good master\* He panted out and shifted on his paws again, flexing the claws down and into the carpet, continuing to dutifully nurse and lick roughly around the fleshy shaft filling his jaws.

"G..good.. boy.. nngh..!" Stephen groaned out as he stiffened upright for the first time, bucking his hips forward and driving into Toby's muzzle, throbbing and erupting in a flood of thick, sticky canine seed, purging the lot from his body.. While Toby whimpered and tucked his ears back flat to his head, though his tail moves in a steady wag at the praise.. something still seemed …. … good boy.. he was a good boy! Thoughts of greeting his masters upon return from work, playing in the park, visits to the vet, all the neighbour dogs and territories flooding his mind, washing through him in a rush of pleasure and joy.

Stephen slumped back and smiled, quite satisfied.. he looked down and chuckled softly, helping the shepherd wriggle the rest of the way out of the comically-oversized shirt, smoothing the pup's fur back down.. "You're a good boy, Toby.." He grinned a bit wider as he watched the dog roll over.. True to character, his dick was out and fully firm, dripping now into the bellyful. A hand reached down and circled round the pink-red flesh, starting to stroke slowly, each pump bringing a jerk of juices from the dog. "You know.. there's still some of you.. me, that is.. left in there.. but if I gave it up.. you have to too.. you're going to be the dog that's kicked around and teased from now on.." He laughed openly as the dog whimpered, ears pinned down and forepaws held flush to his brisket, hindlegs stretched out fully, completely presenting himself for the human. "You empty out.. and that will be the last of the human.. and the start of the dog.. but you already know how to be a dog.. so you can't be a human." 

He grinned and tightened his grip despite the dog's whimpering protests, pumping a touch faster as well,  "Oh, I've been waiting, trying to get this to happen for a long time.. all the show of presenting to you and Dave.. envying your lives.. I could have changed him, but you stayed home.. and finally succumbed.. Now be a good dog.. and BE a dog.." He reached down with his free hand, fingers circling around the shepherd's bloated knot.. beaming with glee as the dog howled out, pushed over the edge, spurting quick, thick bursts of human seed across his bellyfur, rapidly making a mess of the pelt.. "Shh.. that's a good boy.. good.." He smiled, stroking Toby's chin, watching the dog's eyes fade and grow dull brown, timing much in sync with each burst of seed loosed. "Good boy, Toby! Good dog.." He dips down, lifting his hand up and tasting just a bit of the seed from his fingertips, cleaning the digit off, "And now I'm Stephen.. and everything's going to be just fine.."

"Oh! Silly me.. I'm not a dog anymore, YOU are.. you get this.." He laughs softly, reaching up and unfastening the collar, pulling it from his neck, working to fasten it around the german shepherd's throat instead.. turning it about and straightening the tag engraved "Toby" The dog rolled to his paws, unashamed of his spent erection or the mess of human genetics spattered through his bellyful, his only concern was to affectionately lick and kiss at his master's face.

By the time maintenance got to the apartment, everything looked as normal as could be, and Toby was a very, very good boy.

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