Mission 1: First Encounter

In the far depths of space, close to the galactic central core, lives a race of beings plagued by a genetic disorder. Early in the universe’s history this race reproduced sexually like any other evolved species. Their bodies were similar to humans, but their skin was a pale gray color thanks to the unique atmosphere from their planet. This race made great strides in their understanding of the universe and as the eons passed so too did their push for greater scientific knowledge.

Over time however, their push for a “pure” physical form, led scientists down an irreversible path. Fueled by a desire for a longer lifespan, the race modified their DNA so that their reproduction no longer had the need for two distinct sexes. Instead they all transitioned within just 3 generations to genetically modified “pseudo-males”. Their bodies grew short and small, not maturing physically beyond 16 years old. Most of them never grew taller than 4 feet high. However, other parts of their bodies had an extended growth period in order create the new needed sexual organs. Every one of them being based on males from the start was born with an exceptionally large penis. After development was over at age 16, it would hang down all the way to their knees. Their anal cavity over the development cycle transformed into a cloaca or sorts. A pouch in their lower abdomen formed as a specialized womb for creating new life. Being more like males however, there was no egg for fertilization. Instead a single sperm cell would divide and replicate when coming in contact with new genetic material. The race could also choose which genes to use and which to discard through careful meditation as the child developed. This was a safeguard put in place to avoid the pitfalls of inbreeding. 

Although the initial few generations found this new way of life regrettable, over time the race adapted to and embraced the changes. Through the years they came to call themselves “Xipen,” and their society flourished for millenia.

…

The year was now 3569 by the Xipen calendar, and a research team was sent out through the galaxy to search for something important. Though the safeguard for their DNA had worked for ages, signs of genetic degradation were beginning to show. Some Xipen were born much smaller than others. Some had clinically small genitals, making reproduction impossible. While others still never developed their cloaca. The time had come to seek out species to bring new genes into their population. Five teams were sent out from their homeworld with a single mission. Find robust and pure creatures and collect as much DNA as possible from each. 

A recently matured Xipen named Unsal was part of the fourth research team. His team was dispatched further than any other to a small blue planet on the far side of the galaxy. Ages ago a scout found the planet by accident and reported back with a long range data burst showing a promising world brimming with life. However, the scout crash landed and was never heard from again. Unsal had sent countless other scouts out to the planet, but very few returned with new information. It seemed there was a dominant species on that world, but they were a race with too many variants in their DNA which made their genetics impossible to engineer a cure from. There were however large populations of more primitive, but genetically pure species in pockets where the advanced species had not settled. Vast deserts, forests, and mountains all of which presented creatures to collect genetic material from. 

Unsal was excited, but a bit nervous as well. Though he was eager to explore the distant planet, he also knew just what he had to do in order to collect the DNA. It was of course all covered in the training manual, but it would be his first time with any creature. Having only reached maturity in the past year, he understood that his youth and virility made him a perfect candidate, but he still was a brilliant mind and hoped his intellect would be just as useful as his body. 

Unsal suited up in a tight single piece gravity suit and prepared to be dropped off by his crew. The suit kept his long penis snugly cradled against his chest for protection and comfort. It was a simple design which worked for his kind for decades. He wore around his wrist a multifunction device which was essential in keeping the creatures he would find docile while maintaining their libedos. 

“ATTENTION CREW NUMBER 16325. PREPARE TO FOR IMMEDIATE TRANSPORT.” The automated voice echoed through the chamber lock and the ship swooped out of the sky and into a wooded area. Unsal took a deep breath and when the ship finally stopped he opened the pressurized door and took his first step onto the planet’s surface. “GOOD LUCK 16325. WE’RE COUNTING ON YOU.” The ship then cloaked itself and flew back up from the trees. It took its place above him, maintaining radio contact and scanning capabilities. 

Unsal took a deep breath and looked around the area. He might have been afraid of being alone on the strange planet, but he was focused on the mission which quelmed his lingering fears. He stood listening to the winged avian creatures chirping in the trees. It was a good sign. Where there were avians there were likely other creatures. Ones who he could coax into sharing their DNA and were large enough to be capable of penetrating his cloaca to do it. While the Xipen certainly had other methods for collecting DNA, nothing was more effective than a direct injection into their bodies. 
Slowly Unsal began walking through the trees. He held up his wrist which displayed a short range radar of the area, mapped by the ship. It was designed to show a small dot when a suitable creature was found. Luckily there seemed to be a couple very close to where he was. The wristband also had a built in sound damper which helped him to sneak up on the skittish creatures of the planet. 

BOOP! A small dot appeared suddenly above his wrist. The holographic map extended and pointed out straight ahead. As he moved closer the dot got larger indicating a bigger creature. Looking up from his wrist Unsal stopped to see a larger four legged creature covered in brown fur. On its head appeared to be branches of some kind. 

"Unsal to command," he whispered into his wrist device. "Suitable target located. Run analysis."

"CONFIRMED. SCANNING…." the automated system said. BOOP. "SCANNING COMPLETED. LOCAL LIFEFORM REFERRED TO AS 'DEER.' STARTLES EASILY. MILD SEDATION RECOMMENDED."

"Understood." Unsal adjusted the settings on his waistband and prepared to fire. A burst of light shot out and seemingly splashed across the head of the deer. The light was a low level energy pulse which created an effect that made the creature extremely calm and open to touch of any kind. The energy also acted as an aphrodisiac, stimulating the pleasure sensors in the brain. The deer slowly got down, and laid on the ground as a result of absorbing the energy.  "Subject has accepted the sedation. Requesting radio silence until genetic extraction is complete."

"AFFIRMATIVE 16325. GOOD LUCK."

Unsal took a deep breath then slowly approached the deer. When he was standing right beside it, he crouched down which caused the creature to turn looking at him. "Hey there Mr. Deer," he said, running his hand across the creature's back. He felt the warmth of his fur and smiled. "You're magnificent. I hope you don’t mind sharing your genes with me."

Unsal ran his hand down to the deer's tail. He ran his fingers along the short length of it, exploring the feature. As he did so, the deer rolled over to one side revealing his underbelly. Unsal turned his head to the creature's face watching for any sudden shifts in emotion that would cause concern. There were none as expected. The deer had a glazed look across its face as it just let Unsal touch its body. Unsal rubbed his hands along the upper shoulders, down the central white furry chest, until he reached the creature's sheathe. He looked in amazement, admiring the unique anatomy. It was so much different than his own, which was constantly on the outside of his body. Unsal, like other Xipen, had internal testicals, but this creature's hung down below the sheathe.

"Quite an interesting evolution," he said, gently rubbing the sheathe's opening. "This could prove useful for many of us." 

Working his fingers across the sheathe, the sensation quickly caused the deer to become erect. A long tapered shaft emerged from the sheathe and pulsed as it grew. When the creature was fully exposed, it suddenly stood back up which caused Unsal to jump back in surprise. At first he was concerned the sedative had worn off, but he quickly realized what was happening. Just as he stood back to his feet he saw that the deer was bucking its hips slightly.

"Oh, of course!" Unsal exclaimed, and he quickly zipped down his suit. "Your species probably has to stand, huh." He pulled off the tight body suit exposing himself to the crisp air. Stepping out of the fabric, his long cock flopped down to his knees. Carefully, he crawled down under the deer and raised his back side to the creature's feral cock. "Ok big guy, you know what to do." 

The deer lunged forward pushing the tip of his cock against Unsal's cloaca. He gasped feeling the feral creature's length slip inside. Though he wasn’t on this mission for pleasure, that didn't mean he wasn't going to feel any. This was the first time since maturing that he had another creature inside of himself. The tapered length pushed deep into his hole and then quickly was pulled out again. The wild animal instinctively thrusted in and out repeatedly pleasuring both of their organs. 

Unsal couldn't help but pant as he was violated by the deer's cock. His own length flopped back and forth leaking long streams of precum from being rubbed from the inside. 
"Sweet Xipas!" Unsal moaned. He hadn’t expected that his mission would be making him feel this good. "Oh, yeah Mr. Deer! Breed me!" 

His mind started going blank, just as the deer reached its climax. The creature pushed its hips hard one more time against the Xipen's hips and shot out a thick load of its cum. Unsal gasped as his insides became filled to the brim with the streams of hot liquid. The pleasure was almost unbearable, and it took every ounce of his remaining mental energy to keep himself from orgasm. It was one of the most important rules in the mission. Don't leave any foreign genetic material on the planet. At least anything besides the obvious precum, which would quickly absorb into the ground. Unsal shivered as the deer pulled out of him, and he collapsed into the dirt. When he had fallen the deer then leapt over him and scampered off into trees. The sedative had worn off after it ejaculated. 

Unsal took a few moments to catch his breath, clenching his cloaca shut in the process. "Oh, wow. That was unreal." He slowly pushed himself back up and walked over to his clothes. He stepped into the legs and pulled up the suit until he was fully inside and secured again. Pressing his wristband he returned communications with the ship. 
"Unsal to command. Mission number one successful, requesting immediate extraction."

"CONFIRMED 16325. GENETIC CHAMBER OPENED AND READY FOR DEPOSIT."

The ship swooped back down where it had first dropped him off, and he rushed to the door. The airlock opened and shut tightly. Unsal quickly removed his suit within the airlock and tossed it aside. A mist of disinfectant vapor washed over his body and a hatch lit up on the side of the small room. He walked over to it and pulled out a clear cylindrical tank. The top of the tank was a large open funnel. Unsal sat the cylinder on the floor and squatted over it. Taking a deep breath he unclenched his sphincter and pushed out the deer's cum from his body. It slowly dripped out of him, and collected in the cylinder. In addition Unsal finally was safe to release his own cum. His long member twitched and he shot out multiple streams which coated the opposite wall of the ship. Luckily this process was common among the collection teams so the walls were coated with hydrophobic panels. 

After a few minutes, Unsal was sure he let the last of the deer's cum fall from his cloaca (at least everything but the traces still coating the inner walls). He stood up and flipped over the funnel side of the cylinder sealing it tightly. Replacing the cylinder in its compartment he was clear to dress again. 

ZIIIIP! 

"EXCELLENT WORK 16325." The ship's system echoed through the intercom. " SEARCHING LONG RANGE DATA FOR MISSION TWO. PLEASE STAND BY."