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It had been nearly a week since Ax had undergone the new treatment with his neighbor Celeste while in the treatment facility, the wild dog sat quietly on his cot with his hands behind his head as he tried not to get too aroused from his own mouth. Normally this would not be the case, but when he had tried to cure his cock-tongue by having essentially oral sex with the feline, who had also contracted an STFD known as pussy-mouth, instead of curing each other they ended up giving one another their respective diseases. While it had shrank the wild dog's cock tongue, now the sensation of having its sensitive flesh rub against the equally-stimulating lips that had formed from his muzzle it was essentially like having sex with himself. Even the libido suppressants that he had been given weren't entirely effective anymore, and when he glanced over at the tigress he noticed that she was having a similar problem.

Even though they were essentially cell mates for the duration of their stay neither creature had talked to one another much ever since their treatment failed. Perhaps it was seeing what they had just been afflicted with or the fact that they had jumped into bed with one another only a few minutes after their treatment had taken effect. Of course as he watched her hands begin to tease her pert nipples there was another possible reason as well. Despite their lack of communication he had begun to feel for her more, as though he needed to be together with her one more time...

Suddenly the door to his room opened and he saw a red-scaled dragon in a lab coat usher him forward. Ax sighed and stood up, both erections still prevalent as he was led out of the room to a place where he would be examined once again. It was the same every day; he would get his blood drawn, take a urine test, and get both his cock-tongue and regular member jerked off for semen collection. Once that was finished he would have a meeting with the dragon, whose name was Dr. Anthony Lamar, to go over his symptoms.

"Looks like your phallicitis is still under control after the last treatment and that the introduction of a new STFD has not caused any additional problems," the dragon said as he looked over the same chart that the wild dog had seen him do every time for the last week. "How are we feeling? Not just physically, mentally as well. Any uptick in your libido or strange needs or wants that you can't quite explain?"

Ax thought about it for a second before he shook his head. He knew he should have told the doctor about the feelings he was having for Celeste, but he merely equated them to puppy love and he didn't want to be moved from her sight. "Hey doc," Ax asked to try and get his mind off the subject as he felt the erection he had just managed to wrangle down start to stiffen again from the thought of the tigress. "Where is Frysco? I haven't seen him since the test went down. He didn't get fired, did he?"

"Oh no, nothing like that," Dr. Lamar said as he waved his hand. "He is currently on assignment from the CDC to try and locate his missing mentor after they lost track of him trying to study a breakout of STFD on another continent. Don't worry, though, until he gets back I'll be here to take care of you guys."

The session concluded and Ax was escorted back to his room once more, where he saw Celeste running on a treadmill. Due to the nature of their illness and the need to track the symptoms it was required that they be naked the entire time, which did the wild dog no favors as he watched her ample breasts bounce up and down with each step. He needed to distract himself and did it the only way he could, by going to the toilet. As soon as he stepped on the tile divider the walls of his room frosted over and gave him some privacy for if he had to go to the bathroom.

He sighed and sat down on the toilet as he put his hands on his head to try and calm himself once more. Due to regulations the frost effect only lasted a few minutes, just to make sure he wasn't just going in there repeatedly to try and take advantage of the privacy effect. Since he had already activated it he decided he may as well use the time and jerk himself off once more. With that plus the sample extractions he figured he might satiate himself enough so that he could get a decent night's sleep, or at the very least be able to look at the naked tigress.

Celeste... the very image of her in his mind caused his cock to throb as he began to stroke it. At the same time he began to slide his cock tongue in and out of his maw, which reminded him of when he had done the same to the tigress as those heavy breasts of hers pressed against his own chest. He could feel his entire body start to tingle in pleasure as his hand went faster and faster, though he still had the semblance of mind to angle his cock to make sure that he got as little on him as possible. After about a minute, though, his pleasure turned to confusion when he could no longer completely wrap his fingers around his maleness anymore.

At first Ax thought something had happened to his groin, but when he looked down and saw his normal member jutted right at him he immediately began to look around at other possible culprits. When he looked at the hand he had been using to stroke himself had become slightly swollen, confirmed when his fingers hardly bent when he told them to. As he looked closer at it too it appeared that some of the fur that had normally been on his fingers was also gone, though the doctors had said that a potential side-effect of the treatment might be fur loss. In the end it was enough of a concern to kill his boner, and though he thought about trying again, he knew if he stayed on much longer they were going to look in on him.

Instead Ax sighed and got up from the toilet, flushing it before heading off back into the main area of his room. The plexiglass walls that surrounded him went clear once more and he saw that the tigress had finished her workout and was now on her cot. He was about to go up to their shared wall and give a knock on the glass to see how she was doing, but as he approached she had her right hand against her muzzle and appeared to be coughing. Had her symptoms somehow gotten worse, Ax thought to himself as he decided to head back to his cot instead. As he laid down for the night he turned over, which caused him to miss the tigress turning her head and looking straight at him as she continued to cover her muzzle with her hand...

************************************

The next day Ax's eyes snapped open as he awoke, definitely feeling something that wasn't right as he bolted out of bed. When he looked down he gasped at his left hand, or what had been his left hand as of the night before. Instead of his fingers he had what looked like a mitt on, the digits completely merged to the point where only the creases where his fingers had been separated the only indicator that he ever had one. The flesh was also completely furless up to his wrist and had turned a bright red, which made it look inflamed though he wasn't in any pain. In fact as he took an unaffected hand and rubbed down it his entire body shuddered in pleasure.

Almost immediately alarms began to go off and Ax looked around in shock at the sudden noise. When he turned to Celeste's cell he saw that she was not only awake, but with her naked body pressed against the glass between them. As soon he saw her his panic and fear were both washed away with an all too familiar sensation now. The two simply stared at one another as Ax put his infected hand against the glass. She did the same, and what the wild dog saw was enough to snap him out of his lovestruck state when he saw it.

It appeared the tigress' hand had also merged its digits together, but unlike his which had turned into a cylindrical shape hers looked somewhat like a fist. In the middle of that fist; however, was a very familiar opening, pussy lips pressed against the glass right where his affected hand continued to rest. Before they could say anything to one another, though, the doors slid open and a number of people in hazmat suits rushed them both. As soon as Ax saw Celeste get taken away from him he started to fight those that had held him, trying to get at her to rescue her. He was so caught up in his frenzy he failed to notice the needle until it got jammed into his neck, his eyes rolling back into his head as the quick-acting medication took effect.

Meanwhile in an observation room Dr. Lamar sighed and shook his head. "Their condition is deteriorating rather quickly," the dragon said as he shook his head before he looked at the lizardman behind him. "With Frysco still out in the field I think we need to administer stronger treatment. I want to use my gene therapy in order to see if we can't weed this new mutation out of their bodies before they become too gone."

"Doctor... aren't you currently running your tests on the tentacle creatures?" the lab assistant said. "I know that they're starting to mutate, but it was Frysco's experimental treatment that got them to this point in the first place. I'm not sure if trying something equally as untested would be helpful to them right now."

The dragon frowned and looked back at the lab assistant. "One of them is growing a phallus for an arm and the other has the feminine sex in her hand to match," Dr. Lamar instructed. "The fact they're on complimentary hands and seem to be attracted to one another after their initial cross-infection is not a coincidence. The wild dog already started fighting our hazmat crew when they took her away, how much longer do you think they'll be in control of their own faculties if we let this continue on?"

"I don't think Frysco is going to like this," the lab assistant replied. "I'm not even sure the board is going to approve this, especially after the last disaster. Still, if you get approval to try out the treatment, we'll be more than happy to administer it for you."

The doctor just nodded and then dismissed the assistant, leaving him to his thoughts as he moved to the next section of the facility where the two unruly patients were being kept. As they put two unconscious bodies in sectioned off areas of the room he wondered at what point the hazmat team had knocked her out as well. It didn't matter though, he thought as he looked down at the throbbing flesh that had been the wild dog's left arm, he knew that he had the power to help these two. His therapy treatments had shown miraculous results with those infected with tentacle infestations, most of them shrinking the affected appendages down by fifty percent with a marked decrease in the need to spread them.

Dr. Lamar's frown deepened when he realized the board will never go for it. His own research had been threatened when they learned that Frysco tried such a risky experimental procedure on the two. If he came to them with such a proposal they would shoot it down immediately. However... he did have access to the lab, and since he was the one that was in control of the gene therapy project, he was the one keeping track of the supplies used.

With little in the way of hesitation the dragon walked swiftly to his lab and opened the door. When he was sure no one else was around he began to substitute the genome sequence of the tentacle creatures with the template for the diseases of the two infected creatures. Since he wasn't sure which one was the most prominent he decided to do them both, though he had to restart several times when the computer wouldn't allow him to sequence solutions for multiple illnesses. Each time he had to start over and delete the tentacle infestation genes before putting in theirs, going faster and faster as his frustration mounted. Finally after the sixth time he got it to work, waiting eagerly as the machine prepared the concoction that would hopefully make the two patients better and prove once and for all that his techniques are the best.

**********************************************

A few hours later Ax woke up, his cock-tongue pressed limply against his pussy lips as he slowly regained consciousness. The first thing he realized was that he was hooked up to some sort of machine, the second is that now his left arm looked completely like a canine member. The flesh was rather flexible and he found he had a little bit of mobility to it, though it was hard to gage since he was strapped down to a chair. When he felt a similar stiffness in his other hand he looked down to see that it had also mutated as well, except it looked exactly like Celeste's pussy hand as he tried to unclench his fingers and failed.

"In case you were wondering," the voice of Dr. Lamar said as he entered his field of vision. "Celeste has a cock for a hand on her left side now, too. It appears that you two truly are complementary to one another."

"Where is she!?" Ax snarled as he tried to leap out of his restraints only to be held fast by the straps. "I have to be with her! We need to be together!"

"Ah ah ah," Dr. Lamar replied with a wave of his finger. "That's just the disease talking Ax, somehow it has mutated when you cross-infected yourself with the tigress' STFD in order to try and fight the progress of your own. Now thankfully for you with Frysco out on assignment I've been authorized to give you a treatment of my own design, one that's going to hopefully not only halt the progression of your current mutated disease, but possibly roll back the initial one as well. Until that happens; however, you're going to need to be restrained... but if this therapy works we should receive results in a few days."

At that point Ax was no longer listening, his ears strained for Celeste's voice as he called out her name. The draconic doctor just rolled his eyes and checked his fluid levels before he left. This continued on for several days as the mutation on his hands got worse. His body continued to buck at the restraints as he tried to get to where he believed the tigress was; where he could feel the tigress was. The doctor was wrong, Ax thought to himself as his transformed hands tried to reach out, this wasn't the virus that was trying to tell him to do something... it was the virus that revealed that they were soul mates, creatures destined to be together forever.

No one seemed to listen to Ax; however, as the technicians continued to administer whatever new drug they hoped would kill the thing inside him. As the days progressed he did start to feel the sheer need to join with the tigress start to fade, but in its place he began to feel something... different. An entirely different instinct that started to overshadow the one that needed to bond with Celeste. Then after a few more days he felt himself grow calmer as he realized that the two instincts he now felt were not necessarily exclusive of one another, and with nothing but time on his hands and a more rational mind he realized exactly what he needed to do in order to satisfy both of them, if this treatment didn't completely cure him first...

As more time passed it appeared that the treatment was doing just that, the fur on his foreamrs starting to grow back as his fingers began to regain their former definition. Even his cock tongue and pussy lips had begun to shrink considerably, though they still hadn't reformed to their normal states yet. Most noticeably to Dr. Lamar was that the two no longer seemed to urgently pine for one another, which meant that his treatment had been successful in preventing the further spread of the STFD. He made sure to earmark the data on his two subjects so that he could submit it, thinking of how he was going to explain how he came to such a breakthrough as he went down to the containment area that housed Ax.

"How are we feeling today?" Dr. Lamar asked, watching the wild dog intently as he gave him as best a smile he could manage.

"Much better Doctor," Ax replied. "I feel like I can think again for the first time in ages, which from what the technician told me was your doing?"

Dr. Lamar just gave a smug grin and waved his hand. "It's always a team effort when it comes to these sort of things," the dragon replied in his attempt to be humble. "I only wish that Frysco wasn't still on assignment to be here and see the remarkable progress that you two are making. Now I'm sure you've had enough of that chair, let's get you out of there so we can move you back to your proper room while we wait out the rest of the treatment."

The wild dog watched as the dragon as one of the assistants moved forward and undid the restraints that had held him for the last few weeks, the canine breathing a sigh of relief when he rubbed his wrists. Once he was completely set loose Ax let out a mighty stretch and his hand began to drift down to his cock, which other than collecting samples had been completely ignored, but when he turned and looked at Dr. Lamar he quickly pulled back. The dragon marked something down on his chart and then asked for Ax to follow him, leading him through the containment bay until they were joined by an orderly with a tranquilizer gun as he opened the door.

"And now for the final test," Dr. Lamar said as he showed Ax to one of the rooms, watching as the wild dog's eyes widened when he saw the tigress for the first time in days. As soon as she had heard the door opened she turned and smiled at him, then started to run towards him before Dr. Lamar told her to keep some distance. As she did the orderly who was armed with a tranquilizer rifle slowly lowered it once again, though he kept a wary on both of them. "As you can see the treatment has significantly reduced your need to be with one another, now while I can't recommend making you two roommates again, we can put you back into quarters that are a little more comfortable."

"That sounds great," Celeste said, "I can't wait to take a shower again."

"You know what I can't wait to do," Ax said before he turned back to the orderly. "This." Before he knew what hit him the wild dog had kicked him square in the gut, then once more to the head as Dr. Lamar looked on in horror.

"What are you doing!?" the dragon shouted before he was pushed into the quarantine room with Ax right behind him, sealing the door behind him. "This isn't possible, I cured you!"

"That's exactly what we wanted you to think," Celeste said as she ran towards Ax once more, her speech becoming slightly hard to understand as the cock tongue engorged once again. "Though we have to thank you Dr. Lamar, if it wasn't for your treatment we would have never have gained the rationality in order to calm ourselves enough to trick you. Now thanks to you no one will ever keep us apart again."

Ax just smiled at the tigress as they faced one another, then held up their transformed hands to one another. Both creatures let out a loud moan as their cock arms fed into the other's pussy hands, filling them with a pleasure they had never experienced before in their entire lives. They began to thrust their arms against one another as their muzzles met in a lewd kiss, their shaking legs hardly able to keep themselves up as they continued to pleasure one another in every way possible. Their eyes closed as their cock-tongues continued to rub against each other and the sensitive lips of their changed muzzles, but as they continued to do so the flesh between them started to fuse together.

Meanwhile Dr. Lamar could only watch in horror as the arms that had been thrusting against one another no longer slid in and out, instead they seemed to move in unison. Their fur began to meld together as their arms became one appendage, though it continued to move back and forth as though they were thrusting into one another. At the same time Dr. Lamar could see their muzzles begin to merge together as well, the flesh knitting together as the fur on their heads began to fall away to reveal bright pink flesh underneath. It was almost like... like they had been infected with some sort of strange tentacle infestation variant as well, though there was no way that could actually happen.

As the two heads continued to merge into one Dr. Lamar thought back to how he had made the therapy in the first place and quickly realized his error. When the computer continued to kick out his formula, the last time he entered in his stats he must have forgotten to delete several of the gene sequencing he used to combat the other STFD. Now it appeared that the therapy had caused the disease to mutate traits common in it, which as he realized what one of them were he quickly went to the radio and began to call out for help. The voice on the other end told him that they were coming to get him, but that it would be a few minutes to properly suit up for a containment breach, something Dr. Lamar shouted that they didn't have time for as he heard a wet splat behind him that caused him to turn around.

At this point only the torsos and genitals of the two creatures were the only identifiers as which one of the two merged creatures who had been Celeste and Ax. Their heads and arms had completely fused into one another, and if the motion of their bodies was an indicator they still seemed to be getting some sort of pleasure from the act as their legs and tails completely lost their fur. The dragon's eyes became wide in terror as the infected limbs thickened and turned to cock tentacles, all of them leaking their infectious fluid as the creature continued to writhe in pure ecstasy.

Suddenly the voice from the radio spoke up and told Dr. Lamar it was just going to be another minute, which caused the monstrous creature to slowly lean in his direction. With no eyes or other features the dragon still knew that it was looking at him, drawn to the noise of the intercom. For a few seconds the doctor stood completely still, hoping that the lack of sight rendered him invisible to the creature he had accidently created. When it started to slither his way it was clear that wasn't the case, and he tried to make a run for the door only to be tripped up by what had used to be the wild dog's left leg.

As Dr. Lamar shouted for someone to help him it was suddenly cut short by the cock tentacle that had been the tigress' tail wrapping around his throat before pushing into his maw. The dragon tried to bite down on it only to have it stretch his jaw wide as the creature began to hover over him. He could already taste the salty tainted fluid run down his throat as it began to push deeper down while the thicker cock tentacles wrapped around his body and pushed their way into his clothing. By the time the radio had announced they were about to come in it the leaking appendages had soaked his scales and his clothes as it looked like a mass of snakes were writhing around in it.

A few minutes later the door opened and several men in hazmat suits started to rush in, only to stop dead at what they saw. Somehow the monster had stripped the dragon completely naked and had several tentacles pushed into his upturned ass while another two were lodged deep in his gullet. The dragon's ridged member was already at full attention and leaking, his glassy eyes turned slowly to look at the men that had come in to rescue him. When the monster sensed their presence it immediately began to slide towards them on the clum-slickened floor, only to fall backwards as several darts were shot into its sensitive flesh.

Once the extraction crew was sure they had downed it they carefully dislodged the tentacles from the dragon and helped him to his feet. "About... about time you got here," he said after coughing up a wad of spunk that dribbled down his chin. "I need... decontamination and antivirals... then we need to study this thing..."

"Don't worry Dr. Lamar," the one that held him upright said. "We're going to take care of you." The dragon nodded and was escorted by the men as he tried to shake off what had just happened to him. The last thing he remembered was the tentacle creature merging into one and then it pounced on top of him... after that though there was nothing. As the tried to remember what happened after he suddenly realized that the hazmat team was gone and that he had been placed into an empty containment room.

"Wha... what's going on here?" the dragon demanded as he tried to wipe the drying cum off of his scales.

"You are being observed," a voice he recognized as his assistant said over the loudspeaker. "You've been heavily infected with a new hybridization of several STFD's and data is being collected on how it will manifest in a previously uninfected individual. Given the transformation time of the two hosts that created it, I doubt we will have to wait long to get our initial results."

"What is the meaning of this?!" Dr. Lamar shouted as his hands began to stroke himself. "I'm one of the most brilliant researchers in this facility and I know we have the means to stop a lot of early stage infections! I know this is new, but there is a good chance that they'll work against this, too!"

There was a brief pause as the dragon began to feel warm, especially around his groin as he started to stroke his member before he finally heard a reply. "That could be true," the lizardman replied. "But the board doesn't wish to spend any unnecessary resources on those who can't follow simple orders. Who knows, though, perhaps if you still retain your intellect you can help cure your own disease."

The dragon let out a loud cry but it quickly became garbled as clear fluid began to gush out of his stiffening neck. He could feel his fingers and toes beginning to merge together, but as he looked down at them his vision began to grow narrower. He continued to try to speak, but as his lips began to close up and his tongue thinned out it quickly became impossible for him to do so. The scales that he had prided himself on slowly dissolved away to turgid cockflesh as he felt more fluid come up from his throat, pushing its way out of his cock slit of a mouth as his eyes blinked one last time before closing up for good.

Now blind, the dragon tried to reach out to find something to help him, but the sensations of his limbs against the already wet tile floor started to overload his thoughts as his fingers failed to flex. His body flopped on the floor as his back legs turned to tentacle cocks, as well, which writhed behind him as his tail quickly followed suit. Every move that Dr. Lamar made caused him pleasure and it quickly became all he thought about as the floor began to puddle with the sexual fluids he released. It wasn't long before Dr. Lamar was no more, replaced instead by a tentacle cock dragon whose only sounds were the wet squelches as his phallic limbs gushed its highly infectious fluids while it thoughts were burned away and the only thing it could focus on anymore were pleasure and copious amounts of sex...

The lizardman sighed and looked down at the creature that had once been a brilliant scientist, now drooling over the floor from all the new cocks that it had grown. "Make sure that we get around the clock observation on this one," he said to the otter in a labcoat behind him. "When the hazmat team goes in for samples they will have to sedate it first, I don't want to lose anyone else over this."

"Yes sir," the otter replied. "And congratulations on your promotion."

"Thank you," the lizardman replied as he looked back down at the former dragon. "They just happened to have a spot to fill..."