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Roland stared at the illusory diagram taking up the space above the professor's head. The white wolf was fixated on the middle-aged stag's words, like many of his classmates.

The cervine professor gestured with a long metallic rod at part of the diagram. One could have been forgiven for thinking it was merely an anatomical diagram of the male reproductive system, but if they had been there the whole lecture, that was merely scratching the surface.

"At this point, the transformee is entirely dependent on the transformist, receiving all vital functions from their host." The deer explained in an even baritone. "Thinking is preserved, but is often changed due to the nature of the drastic shift of the body. The two participants can continue to communicate mentally, since they now share the same nervous system."

Beside the wolf, his boyfriend was staring intently at the diagram as his pencil scribbled on its own on his notepad. The coyote was well-practiced in autowriting without looking at his paper after three years of constant note-taking.

As seniors at the magic academy, the two canids were quite close to prepared for whatever daily life as a magic user would entail. The pair had decided to enroll in an elective advanced course on biological transformation together, something they could practice with one another.

Kip, the coyote, had read ahead in the syllabus and had pointed out his interest in this lecture's topic in particular. It was something usually kept as a taboo, at least outside of an academic setting.

Roland hadn't really thought about it much at the time, but learning about the topic certainly got the wheels turning in his head.

The middle-aged deer spun his indicator stick and the diagram dissipated into mist. He brought one hand to the opposite end of the pointer and collapsed it, revealing its telescopic nature. The professor nodded firmly. "Now, we have just enough time left in the lecture period for a demonstration."

The wolf perked in surprise, eyes widening. He sat a bit more upright. Really? A demonstration of this transformation? All around him he could hear the other young men of the academy chattering excitedly to one another. His attention turned to his boyfriend, however.

Kip stared back at him with broadly dilated eyes and an eager smile, before turning back to face their professor.

"I'll need participation from two students, preferably those who are already..." The stag chuckled, gesturing suggestively with his hands. "Well, intimate, obviously..."

The coyote shot his hand up hard enough that he partially came out of his seat. Around the lecture hall a few other hands joined his.

Seeing this, Roland raised his hand as well. If Kip was doing this, he'd participate. It was only fair.

After trailing his gaze around the lecture hall, the professor's blunt hoof-like finger extended pointed to the canid pair. "Roland? Kip? Please come down to the front."

The white wolf carefully closed his folder with his notes in it and stood up from the row desk. He held out the paw he'd raised for his boyfriend to take.

Kip used a swirl of magical movement to slot all of his notes right into his bag, before setting it on top of the desk and standing himself. He took the larger male's hand and started behind other students to the aisle.

Roland couldn't help but notice all the young men turning to look at him and his Kip. The athletic male tried to keep his focus on the coyote leading him on. He also made sure to not bump into anyone with his large frame as they navigated out of the narrow space between rows.

Once the pair reached the aisle and were headed down to the flat space that was normally the domain of their cervine instructor, said stag cleared his throat. "I'd like you both to disrobe."

Kip visibly blushed, but nodded. When he arrived on level footing with the professor, he released his boyfriend's hand and started to unbutton his shirt rapidly.

Roland looked back at their classmates, then let a bit of a smile come to the corner of his mouth. He realized had no reason to be ashamed of his body. As he began to work his way out of his uniform, he heard the professor start to speak again.

"Now, as I mentioned in passing earlier in the lecture, there's a variety of vectors that can be used to initiate the fusion." He explained, not watching his students disrobe. "Incantations can be tricky, considering the required concentration while engaging in sexual intercourse. Similarly, runes and sigils would be easily smudged by the same. Lastly, potions. They can be imbibed by one or both participants, or, as in this demonstration, applied as a topical lubricant." The deer pulled a bottle of lube out of his pocket. "An additional benefit of potions in transformation magic is that the spells involved are made in advance and can be stored and passed from person to person. Far more reliable in a situation like this particular transformation." The deer shrugged wryly. "And being lubricant just kills two birds with one stone."

A laugh rippled through the audience at that.

The pair of canids were just finishing up their stripping by the end of that speech, soon waiting for further instructions. Without their uniforms, they were even further differentiated by their physiques. Roland's body was well formed and athletic in disposition, with broad shoulders and a relatively narrow waist. The only thing preventing his musculature from being overt was the length and softness of his fur.

Kip on the other hand, had very short, fine fur that hugged his figure. Said figure also contrasted with his boyfriend's, lithe and lean with very little extra mass. This was a more regular look for students at a magic academy, to be fair.

"Now. Which of you wants to be the transformee?" The professor's gaze never left Kip's face, and Roland thought he caught a knowing glint in the cervine's eyes, behind his glasses.

Kip looked back at Roland, his blush even deeper, before smiling. "I'd like to be transformed."

The wolf smiled a bit. He'd figured that was his boyfriend's intention. "Yes, I'd love him as my cock."

Ignoring the vulgar wording, the stag smiled. "Well, you two are in agreement. Good." He casually levitated the bottle of lube towards the wolf. "For the purview of this lesson plan, we won't be going over how to undo it. After a while of sharing a body, you can come to me and I can reverse it for you," He said dryly, but winked his upstage eye at Kip. His tone lowered into the bottom of his register as he amended his statement. "That is, if either of you would possibly want that."

The coyote's eyes widened and a blush rocketed up his long triangular ears to the tips. "W-what should I do next?"

At the same time, Roland felt his cock drop from his sheath, pressing out into prominence as blood from his body sent it towards turgidity.

Gesturing to the high table that usually held his lecture notes, the professor inclined his head. "Next, present yourself to your wolf as you find comfortable, using the table for support." Turning to look at Roland, the deer pointed to the floating bottle. "Now, lube yourself and your partner as you normally would."

The larger canid nodded and took the vessel from the air in front of him. With practiced ease he popped the cap with his thumb on the hand holding it and turned it over to squirt some of the substance onto his hand. The white wolf closed the distance between himself and his boyfriend as he began to apply the cool lubricant to his shaft.

Kip carefully hopped up to get his hips over the lip of the table and sat onto it, letting his tail hang between his bare legs. The reason for this became apparent a moment later when he rolled his rump against the hard surface and reached back to support his torso with his hands on the table. The lithe coyote raised his knees in concert, revealing his under-tail only to his boyfriend.

As if just remembering it, the stag looked out to the main class. "Oh, right. Reading for Tuesday. Chapter fifty-one sections one and two. We will be covering that material in the lecture but things will go more smoothly if you have at least skimmed the material." He chuckled wryly. "As for assignments, I want you all to observe carefully of this demonstration and write your honest reactions before we meet next."

Roland, now finished getting his still swelling erection nice and glossy with slickness, poured more of the lube over his fingertips. He brought his fingers down and began to work on lubricating his boyfriend's pucker with one fingertip, then two. The wolf paused, scanning the crowd for a moment, before spotting another muscular male, a tiger one year his junior. "You wrote that down, right? I'll check with you after class to make sure I don't forget."

The feline threw up a thumb in agreement from where he sat.

"Good idea, Roland." The deer smirked. "I don't expect you to remember it too clearly after the experience of this demonstration. It's quite mindblowing for both participants."

The students who realized the implication of this statement unified their efforts to make a suggestive "Oooooooh...." fill the lecture hall.

Kip blushed deeply, putting his hands over his face. His abs tensed to keep himself upright as a flustered whine escaped his throat.

The professor continued as if nothing had happened. "And as you will be personally experiencing it, I only expect the reading from you, not the assignment."

"Lucky..." Someone muttered from the raised seating, getting a general laugh.

"As for you..." The middle-aged cervine addressed Kip with that same low tone as before. "I don't expect you'll be in any state to do any reading or writing any time soon..."

While his boyfriend made a flustered yip at that, the white wolf nodded to the deer and returned his attention to applying lubricant to the bare flesh that was the entrance to his boyfriend's backside. "Everything's okay..." Roland muttered affectionately to Kip as he worked his fingers.

"If you are both lubricated to your liking, you should engage." The stag said matter-of-factly, gesturing with his open hand held palm up. "Penetrate until you can press no deeper. Take as long as you need."

Roland held back a smirk, lining up his shaft with the tip of his boyfriend's tailhole. "Ready?"

Kip nodded, his nerves appearing to have been overtaken by his excitement. "Y-yeah."

Rolling his hips forward with a low, wet squelch of lubricant being displaced, the wolf smoothly pressed right to the hilt in one gliding stroke. He grasped both of the coyote's hips and tugged lightly to make sure he could go no deeper, eliciting a moan from his boyfriend.

The professor's calm, almost playfully clinical demeanor broke for a moment as he looked on in silent surprise at how quickly Kip had taken his boyfriend's sizable erection. It was hard to hide that reaction from the class, who indeed got a laugh out of it.

Clearing his throat, the cervine regained his composure. "Now that full contact has been made, you should feel the process starting."

Kip adjusted one hand on the table to lean up a bit closer to his boyfriend then used the other to feel his trim midsection. "I... I can feel... heat running up my torso... It's definitely from your cock..." He let his legs slump down on either side of the wolf's hips, spread out wide as to not let an inch slip back out.

Roland reached out to take the coyote's shoulder to help support him and bit his lip. He squeezed on Kip's shoulder and could distantly feel his digits. "I... I'm already starting to feel you as part of me..."

The professor smiled and gestured towards the site of their union. "That's good. As you can see, class, Kip's legs are already dwindling, on their way to becoming testicular tissue."

The coyote perked in surprise and craned his head around Roland's arm to get a look at his thighs. By this point, his lower legs had almost fully vanished into his knees, the whole quadricep zone turning more ovoid as his feet were gradually pulled up into the furry mass.

The muscular wolf breathed steadily, deeply, as pleasure tingled from the base of his pelvis to the back of his head between his ears. Carefully, he made sure both his hands were supporting Kip, before using them to press the smaller canine's arms to his sides and hold them in place.

"And now Roland's fur color is asserting itself as his new testicles merge into his original pair." The middle-aged stag narrated on, walking around towards the far side of the table from the conjoined pair.

Kip saw his tan fur fading in a wave from where his inner thighs had been pressed against his boyfriend's sac, turning the same white that covered the whole wolf. He turned his head back to face Roland and craned his neck forward into a passionate kiss.

The stimulation was almost too much for the wolf, feeling both sides of the kiss. Roland moaned, every part of his boyfriend becoming more and more of an erogenous zone with each passing moment. He thoughtlessly started to stroke up and down Kip's sides as he held the muzzle-lock.

The coyote's eyes opened wide in surprise as a low gurgle came from his throat. Sharply, he broke the kiss. Not a moment later, a gush of something clear and viscous escaped his lips. Kip swallowed and groaned. "P-pre..."

Still addressing the class, the professor explained. "At this point, Roland's urethra has fully subsumed his partner's digestive system. Something more readily seen from an observer's viewpoint is how the transformee's arms have fused to his sides and are receding."

Roland looked down at his hands where they were rubbing up and down Kip's sides. Indeed, he had originally been stroking on each of his pinned arms, but all that was left of those limbs were the fading shapes as they joined into either side of his increasingly tubular shaped torso. "You're going to be so fuckin' hot as a cock, Kip... I can tell already."

Kip swallowed down a mouthful of pre, panting. "I... I feel like my whole body has a boner." He chuckled, before more slick bubbled up.

"Understandable, as your own reproductive organs have already melted away into your abdomen to join Roland's." The stag replied casually, before gesturing to what had once been the coyote's hips. "See there, excess skin is folding in on itself. That will be Roland's new sheath when this process is done."

The increasingly phallic male tried to speak again, but coughed up more pre. The volume of natural slick coming up his gullet had him rendered sputtering and wheezing for a moment.

Roland squeezed Kip with his hands, his arousal tempered by concern. "What's wrong?" He turned his head towards the deer, brow furrowed.

"Just calm down." The professor walked back around the table towards them, hands outstretched palm-down. "He doesn't need to breathe anymore, so he shouldn't try to."

The wolf nodded, looking back to the mass of flesh that was his boyfriend in his grasp. "Okay... Kip, don't try to talk either." He started to stroke on either side of his phallic partner again. "Cocks don't talk anyway..." His smile returned as a growl entered his voice.

A blush rushed through the former coyote's fur from his cheekbones to the tips of his ears. He nodded his understanding, as his nostrils noticeably smoothed shut until there was no mark where they should have been.

As Roland's hands continued to stroke up and down, the fur beneath them grew thinner and thinner, as if it were drawing back into the flesh rather than falling out. Soon it was like peach fuzz, and then finally gone, leaving only smooth pink flesh. From where the sheath was folding up on itself up, the majorly subsumed male was entirely bare. At the same time, he tilted his head backwards, his throat swelling out to the breadth of his already narrowed shoulders.

Panting openly now, Roland stroked faster, watching spurts of pre now arc out onto the table from his boyfriend's pursed lips. His eyes widened after a few more jerks as he realized that all his member's facial features were pointed away from him. He stopped stroking, instead pulling Kip back towards himself to look him in the eyes again.

By now the smaller canine who would have reached all the way to Roland's forehead when they were both separate individuals in this position now just reached the base of the wolf's throat. He craned his head down to make eye contact. "I love you, Kip..." He pressed his lips to his boyfriend's own.

Kip weakly smiled and tried to return the kiss, but his snout smoothed itself the rest of the way to a pointed tip. The wolf could feel his cock's lips fading into the slightly puckered opening of a meatus, just before another spurt of pre filled his muzzle.

When Roland opened his eyes, he saw his coyote's ears fold down, and then meld into his head seamlessly. And last Kip's eyes closed, before vanishing entirely. The contours of his face swelled into a perfect cockhead, leaving no facial features at all. What had once been his hips swelled out into a knot, pushing the white sheath down.

The wolf's chest heaved as he stroked harder, clenching his eyes shut. His mind was flooded with all of his feelings for his boyfriend, all the plans they had for the future, all of his love. It all culminated in the undeniable fact that the coyote was now a two foot long wolf cock. Roland howled, his heavy testes jolting as he shot a gusher of seed across the lecture hall.

The professor walked around Roland's back to keep himself clean as the impressive display of virility continued. The change of location made it fairly blatant that his dress slacks were quite tented, even a bit of a dark spot forming from his arousal. "Congratulations, you are now a wolf's cock." The stag playfully said directly to the twitching, gushing rod. The stag turned his head back towards the classroom, seeming to collect his thoughts. He licked his lips for a moment as his eyes darted about the mass of students. "The Cock Transformation, or CTF, is one of the most important magical joinings there is."

Roland continued to tremble, as shot after shot splattered everything from the wall to the floor to the table in front of him. It was good planning that he had not been facing any of the students.

"Be sure that you really want to be with someone before you perform it." The middle-aged deer chuckled. "It's very easy to get attached." He winked, getting a laugh from the other students. He took a chair and placed it right behind Roland, before stepping back.

The wolf trickled to a halt, stroking along his softening cock. Though his legs looked shaky, he managed to stay upright despite the professor's precaution. Roland smiled warmly. He had been right, Kip looked beautiful as that most personal part of him. He lightly bent the increasingly flaccid shaft to look over the pointed canine head, looking for any sign of the man it used to be, but there was none, only beautiful unmarred cockflesh. The former coyote's knot finally went down and was already starting to try to slide down into the thick, fluffy sheath at his boyfriend's pelvis.

"Most guys need a sit-down after that." The stag chuckled, slapping a hand onto Roland's shoulder. "Guess you have good endurance."

Roland nodded, still catching his breath, sucking in lung-fulls of air. His hands, however, reached down to heft his new set of nuts, feeling their weight, before lightly tugging on the edge of his sheath to help his cock slip the rest of the way back into it.

'Sure is comfy in here...' A familiar voice rung out in the back of the wolf's mind.

He stood up straight, looking down at his sheath more intently. Roland thought back to the end of the lecture and what the professor had said about the nervous system. In his mind he spoke back towards that voice. 'Hey, do you need anything?'

The cock twitched and throbbed within Roland's sheath. 'Just need some rest before the next time you need to cum, stud...' His voice was laced with love, lethargy and not an insignificant amount of lust.

'Well, you're adjusting quickly.' Roland smirked a bit at his softening cock as he thought that.

'What do I gotta adjust to? I'm your big fat cock, why would I want for anything?' The voice of his lover dreamily sing-songed in return.

Roland furrowed his brow, but was interrupted in this thoughts by his clothes being pressed into his vision. The wolf looked up, then around.

Most of the students were filing out of the lecture hall and the professor was offering him his clothes back.

After a moment, the canid took his clothes and started to get dressed again. 'Do you want me to make sure everything's okay with the instructors for your other classes?' Roland addressed his pelvic passenger in his mind again.

With something akin to a yawn, his loins replied. 'I'll fuck every professor in school if that's what you want, stud...'

The wolf swallowed as he worked on buttoning his uniform shirt back up. The way that his cock was talking, it didn't seem like he was aware he used to be a student. Some part of him was uneasy at how quick these changes were coming on, but a much stronger part of him felt... warm? Glad. He was proud that his new cock was so focused on his new role as part of him.

He scooped his hefty loins as best he could with one hand before working them into his underwear, feeling the soft fabric stretch taut. Next, his strong legs were hidden behind his uniform slacks, and he had to navigate getting the fly closed around that frankly obscene bulge.

"I hope you're happy with your new cock, Roland." The professor smiled warmly.

Roland's mind danced about with possible questions, concerns to voice, anything. Instead, he just nodded. "Thank you, Sir."

"Please." The deer chuckled, putting his hand on the wolf's shoulder. "Call me Luther."

"Okay. Thank you Sir Luther." The wolf smirked a bit. "I gotta get to my next class. Is the mess going to be an issue?"

Luther shook his head. "Nope, you're fine to go."

Roland nodded and started up the steps out of the lecture hall. Some part of his mind was still shifting about working out the logistics... what would he tell his cock's other professors? His family? He shook his head as he gathered up his and his cock's bags at the desk. All he wanted to do was fuck and cum right now, these hang-ups were just getting in the way.

Pushing away the worries about consequences, the athletic wolf walked up and to the door of the lecture hall... though one question lingered: Did his cock's libido just add onto his own?

"Roland? One more thing." The rich baritone of the older male resonated through the now nearly empty hall. "Do be sure to contact me if you want this undone." The professor smiled warmly. "But I don't think that will be necessary, do you?"

The muscular wolf paused, thinking. Everything in the afterglow of that mess-making orgasm had been so... perfect. Everything felt right, for some reason. He smiled back to Luther from the door. "I don't think it will, no..." He pressed out into the hallway, tail lazily wagging behind him.

As Roland walked towards his next class, milling amongst other students, he realized. He wasn't even thinking of his boyfriend as a coyote anymore, but as his cock... But for some reason, this didn't alarm him, it was... cozy. Perhaps even domestic feeling. His heart was filled with love, the sort that gave off a mood of satisfied comfort. His boyfriend was part of him.

'Why are you calling me your boyfriend, I'm just a cock.' His beloved's voice came unbidden from the back of his mind. 'A big fat cock with a short refractory period. When can we cum next?'

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Luther gestured with one hand and the gallons of spilled wolf cream started to be gathered up by an invisible force, leaving surfaces clean in its wake. The stag glanced down at the pre soaking his slacks and gestured to remove that as well, but it started beading again almost immediately. He huffed and ground his palm against the tent in his pants.

The professor looked to make sure the mess was being dealt with, before starting to stroke along the bulge in the fabric... no classes needed to be done in this room for at least an hour. Luther unzipped his slacks and sat down behind the table. Shaft in his palm he sighed, feeling the heft. He could barely reach his thumb to his fingers, which told him it was getting close to time.

The middle-aged deer chuckled a bit as he thought about the many students of his who had crossed through his life, into his bed... onto his flesh. Unlike Roland, he only added a bit from each he took that way, leaving him comfortably hung, just not overtly so like the wolf had become.

He could still feel each of them, a practical chorus in his mind calling out to be touched, to be loved, to cum for him.

To bring in more to join them.

Luther stroked along his shaft as he wondered... who to add this term? The written assignments would be a good litmus test, for sure.