Unsal couldn't believe that the feral alien creature he had let breed him, also made him feel so good. Though he was a simple researcher, the act of acquiring the genetic material from another being opened a new interest in his intellect. One he had never expected before. His initial fears of letting unknown creatures cum inside him was now a thing of the past, and he couldn't wait until his ship had found another subject. 

"ATTENTION CREW NUMBER 16325. APPROACHING MISSION LOCATION. MULTIPLE PREDATORY TARGETS AT LOCATION. EXTREME CAUTION IS ADVISED."

"Understood." Unsal's heart began racing as he thought about what that might mean. His long Xipen dick twitched inside of his suit as the ship landed onto the planet’s surface. 

The airlock opened and once again Unsal stepped onto the planet’s surface. Not far from the ship was a series of large rocks. On the rocks were six smaller four legged creatures. They were about half as tall as he was, covered in gray fur, and had long tails. 

"Unsal to command. Release localized sedative to my location."

"DUSTING PROTOCOL INITIATED. STAND BY."

A pulse of light flashed over the rocks, and similar to its effect on the deer, caused the creatures to lay down in response. Unsal confirmed the reaction and then approached cautiously. 

"LOCAL POPULATION KNOWN AS WOLF. MULTIPLE AS WOLVES. SCANS INDICATE HEIGHTENED SENSE OF SMELL AND PACK MENTALITIES. GOOD LUCK 16325. BEGINNING RADIO SILENCE."

With his ship no longer monitoring him, he unzipped his suit and tossed it aside. He was eager to be bred by the multitude of creatures, and felt compelled to show them he was prepared for it. As he reached the base of the rock the wolves perked up their heads and scampered down to him. They circled him sniffing the air. 

"Interesting," he said, and in an attempt to make the wolves feel more comfortable with his presence he got down on his hands and knees. Now on their level he could see their cocks already hard and standing proudly out of their sheathes. They were similar to the deer, but had large swollen lumps at the base of their lengths. "Very interesting, indeed."

One of them was quick to plunge his muzzle to Unsal's cloaca and sniff the inviting opening. It seemed to like what it found, licking the Xipen's hole. Unsal gasped as the long flat tongue ran across him. His dick twitched, shooting out a stream of precum onto the ground. 
"Come on Mr. Wolf," he said, reaching back and spreading his hole out. "Hurry up and breed me with that thing!" His voice was sounding desperate. He was not just thinking about the mission at this point, but was now wanting to be penetrated more and more. The wolf eagerly jumped up, draping his front paws over Unsal's shoulders. The wolf's canine dick pushed into his cloaca and stretched open the hole until it comfortably fit its size. 

"Ah!" Unsal shouted, as he wasn’t expecting this smaller creature to have a thicker shaft than the larger deer. His hole squeezed around the canine causing them both to leak out precum in long ropes. 

The other wolves watched and their dicks twitched from the sight. The wolf penetrating Unsal thrusted hard in and out of him. He moaned as the wolf panted. Roughly slamming against his hips over and over, the wolf let its body move naturally. The feeling was so much better than with the deer. While the larger creature had more power behind each thrust, the wolf was faster and more violent. 

"Oh. Y…yes! More!" Unsal was now mentally lost in the pleasure of having his Xipen cloaca bred by the wolf. He couldn't get enough of the feeling of it. Eventually though the wolf neared his climax and its knot began to swell. Unsal could feel the bulb pushing harder and harder against his hole, and he looked down under his legs to get a better view. 
"Wha…what the!?" He was shocked to see the wolf's knot grinding against his cloaca. "What is that!? I can't fit that into my…ARGH!" The wolf pushed hard against him and the wild canine's knot disappeared into his tiny body. Once inside the wolf pushed off of his shoulders and shifted his body around. The wolf's swollen cock twisted inside of Unsal sending intense pleasures through his whole body. Now on the verge of letting his Xipen cum out, the wolf beat him to it and unleashed his hot canine seed deep into him. There wasn't as much this time compared to his last encounter, but the thick liquid still more than coated every part of his insides.

With the wolf finished cumming, he positioned himself to pull out the knot. Unsal gasped as the creature used his thighs to push against for leverage. The swollen red knot was forcefully yanked out causing the Xipen a strange mixture of pleasure and pain. He could feel his cloaca gaping open in the crisp forest air as residual cum leaked from it. As he worked to catch his breath, another of the pack leapt onto his back. 

"Huh?" He looked over his shoulder to see a distinctly different wolf ready its cock to his hole. "Wha…wait I…Aaah!" He tried to pull away but it was too late. The next wolf buried its cock into him and immediately went balls deep. "Oh, Xipas! He's just as big as the last one. Oh…YEAH!" Unsal exclaimed feeling the new wolf pick up the pace and use the last one's cum as internal lubrication. Just like last time he was at the mercy of the wild canine's thrusts. His cloaca slowly began tightening back up around his next lover. He didn't want it to happen, though. He hoped to remain stretched out knowing it wouldn't be long before the next knot was pushed inside. 

For a brief moment Unsal thought about the mission as a whole. He wondered if he was deliberately sent to be ravaged by these creatures. Was it supposed to be a punishment or was it a reward? Perhaps it was a bit of both. At least that's how it felt with his cloaca being forcefully bred by the pack of wolves. Though just as before, his mind would soon go blank as the pleasure coursing through his veins was all he could think about. That, and doing everything he could not to cum, himself.

Once again when the wolf was nearing climax, its knot swelled. Pushing against Unsal's cloaca, the Xipen now was more prepared to be tied. He loosened himself slightly and the wolf slipped inside. Turning its body around, Unsal prepared for another wave. 

"Yes!" He exclaimed. The wolf this time let out a long howl unleashing streams of his hot liquid. Unsal clenched his cloaca hard, milking out even more of the wolf's wild seed. "Oh yeah, this place is the best!" The Xipen said, completely engulfed with pleasure. His body shivered as the fuller he became the harder it was to hold back his own orgasm. 

Just as before the wolf which had just finished cumming, yanked out his cock, and the next of the pack mounted him. This cycle continued until only one wolf remained. By this time Unsal was barely able to hold himself up. The intense pleasures paired with his refusal to let himself cum was now unbearable. As the last wolf penetrated him, he finally resigned himself and broke the rule. 

"Oh forget it! I just gotta….CUUUUUUUM!" His whole body tensed up and his hole squeezed the wolf's cock tightly. Unsal's own cock failed wildly as his body was electrified with the primal ecstasy of orgasm. The pent up cum splashed out onto the ground in a seemingly endless stream. It puddled beneath him, soaking his hands and knees. If it wasn’t for the wolf being buried up to his knot, Unsal would have recoiled to keep his hands dry. 

As he continued unloading his copious stream of Xipen cum, the wolf mounting him forced its knot past the tightly squeezed cloaca. Unsal again moaned, this time letting his voice shout louder than he had ever before. The wolf spun around and just as Unsal came down from his peak. The canine unleashed into him, which reignited Unsal's orgasm again. He didn't have much cum left to release, but it still gave him unbelievable pleasure which completely took over his senses.

Both Unsal and the wolf panted heavily as they released the last of their cum. The Xipen was so full that the second the wolf pulled out a long stream of cum pulsed out of his cloaca. Doing his best to clench down, much of the combined cum from 6 different wolves spilled out to the ground and mixed with his own. 

Looking down at the pool beneath himself it finally dawned on him what he had done.
"Oh, no!" He quickly pushed himself up to his knees and frantically looked around. To his surprise however the small pack of wolves approached from all sides and began lapping up the cum. "Wha?" He muttered every one of them eagerly cleaned the ground as well as Unsal himself. They licked up and down his whole body, messaging away his fears. Their tongues worked wonders and he just sat back on his heels in amazement. They licked everything. His body, his long Xipen cock, the ground, each other, even their own dicks which had mostly disappeared into their sheathes again. 

Unsal curiously reached down and dipped a finger in the cum before they devoured it all. Bringing the musky liquid to his lips he tasted it, rolling the combined seed around his mouth. When he understood the full flavor, he swallowed it all. 
"Fascinating," he said, watching the last of his Xipen cum disappear into the wolves mouths. "A strange taste, but not disagreeable. It seems these creatures have a taste for it." He stood up, clenching his cloaca shut, and looked for where he tossed his suit. 

As he slowly moved away from the wolves, he noticed them following him at a distance. 
He stopped and so did they. He cocked his head to the side and wondered what was happening. The sedative should have worn off when each of them climaxed, but it seemed they have retained some kind of attachment to him. While he was still naked, he used his wrist device to scan one of them. As the scan was in progress, he retrieved his suit and zipped up while the scan finished.

BOOP. SCAN COMPLETE. DATA INDICATES YOUR PHEROMONES ARE NOW RECOGNIZED BY THE WOLVES. THEY SEE YOU AS ONE OF THEIR OWN.

"Oh, wow!" Unsal gasped. He licked his lips and admired the wolves before signaling his ship back. "Perhaps I'll have to get a second sample before heading home…and a third." He hummed to himself as the ship roared overhead. The wolves scattered and hid back among the rocks. "Mmmm…and a fourth." Unsal whispered, jogging toward the ship. "Yeah, five more samples for sure."