The day finally arrived when Stacy would go to the alien's class to be his visual aid. Although she knew that she wouldn't really be doing anything, she was a little nervous. She wondered what it would be like in a room full of aliens. She was also apprehensive about being poked and prodded by them and having to endure what she thought would be the embarrassment of being on display.

She was put on her platform and fed but this time she was locked on. The alien had told her that when she was out of his quarters, she had to be locked on her platform so she expected that. The plug had been placed into her ass and she was slightly disappointed knowing that, except for when the small probe was injected, the plug would remain there all day. "Ready to go and earn your keep?" the alien asked.

Stacy smiled. It was the first time that the alien had joked with her. "Let's go," she answered. She then realized she had just seen another "human" trait in this creature. Her mind went deep in thought with this revelation. Did these aliens have emotions like humans? She had only seen two aliens and, to her, they both looked alike. Humans had male and female. Did the alien race also have male and female? Was "her" alien male? ...female? If they had two sexes, what did the other sex look like?

Her concentration was broken as they entered a large room. The alien explained that this was the lab that it taught in. Stacy looked around. The room could have been a university lab on earth. There appeared to be stations around the edges of the room where she assumed the alien students could work. Her platform suddenly stopped next to a larger platform which was in the center of the room. Next to the large platform seemed to be some sort of a control panel. The alien told her to leave her platform and lay down on the large platform. He cautioned her to remain relaxed as this platform would move her around and that fighting its movements would only result in fatigue to her.

Stacy laid down on the platform and was amazed as the platform levitated her above it. The alien was at the control panel and pressed a series of buttons. As he did, Stacy found herself moving around in mid air. The machine would roll her around, bend her, move her limbs, and make her do all sorts of other things. She wanted to know all about this new technology but the alien told her that there was no time. The creature also told her it had set the machine to allow her to turn her head to look around if she desired but that the machine would not allow any other movements. As the explanation ended, the door opened and 10 aliens entered the room.

Stacy watched each one as the creatures gathered around her. She was somewhat intimidated by the surrounding aliens but they posed no threat that she saw so she just looked back at them as they gazed upon her. She noticed that each was unique in a small way. They had slightly different sizes. Some had larger eyes, some were a little taller, others seemed to be a slightly different shade but all seemed to have the same basic shape and features. As she studied them, her mind wandered back to her question about sexes. She perceived no feature that would allow her to determine if they were two sexes or not. As the aliens settled, the alien instructor began his lecture.

Stacy's body was being rolled and twisted as the alien instructor pointed to different places on her body. She was uneasy being in this new situation but her alien's soft touch had a relaxing effect on her. Stacy's mind had started to wander when she felt her legs parting. She cringed as she felt her knees rising also and found herself in a position where her young pussy was completely exposed. She felt herself blushing as the alien instructor's fingers ran over her cunt. She listened as he pointed out each and every part of her displayed pussy. Embarrassment had completely taken over her until she heard the alien go into a dissertation on human blushing. She smiled knowing he had learned something from her.

As the explanation of blushing ended, the room lights dimmed and a large monitor came into view. The small probe was put into Stacy's mouth and she swallowed it as instructed. She noticed a light spot appear on her skin which turned out to be where the probe was. The light moved around her as the probe moved within her. She looked at the monitor and saw for the first time what her organs now looked like. She knew what was supposed to be there because of her previous premed studies but she looked nothing like that. As the probe rose again to her mouth, the alien took it and placed it into the instrument to inject it into her ass. The machine turned and positioned her for the probe to be injected. Stacy, instead of being embarrassed by something being put into her ass, was anxious to see what she looked like there. Her eyes were glued to the monitor as the probe went up her rectum and displayed her new digestive tract.

The class ended and Stacy was returned to her own platform. The alien informed her that the university had set up a human breeding section and that he was needed there. She was to remain where she was. The alien was going to go to the breeding station and would return for her. Stacy pleaded with him to let her go too. The alien contacted the breeding facility and was told that Stacy would be allowed in but certain conditions were to be met. She was fitted with what the alien called a "Silence Collar" which would prevent Stacy from making any sound. She was locked on to her platform and the two proceeded to the breeding section.

Stacy was excited about the prospect of seeing other humans. When they arrived, the first room that they went into reminded Stacy of the ship that had transported her to this planet. There were a number of enclosures each filled with a human female. The girls seemed to range from about twelve to eighteen years old. There was a mixture of all races. The alien instructor was conversing with what Stacy assumed was a caretaker and as she was moved along. As she was moved along, she smiled at each girl. Some returned her smile, some scowled, and some remained emotionless. Seeing the other girls made Stacy happy. She knew that at least she wasn't alone on this planet.

The group exited that room and entered another smaller room. This one was set up the same as the last except the enclosures contained human males. What surprised Stacy was that instead of being castrated like most of the boys had been on the ship, these boys all had a cock and balls between their legs. The boy on the ship had been the first adult male human she had ever seen nude and now she was in a room full of nude boys. They all seemed to notice her and were all smiling. Stacy blushed as she watched their cocks grow erect. She had never perceived herself as sexually attractive but this room full of hard rods told her that she was. For the first time since she arrived on the planet, Stacy became aware of her nudity. She was uncomfortable being in the room with all these sexually charged men but found herself excited by it also. She looked forward to her next feeding by the alien. She hoped that it would give her relief from the sensations going through her body.

Stacy was then moved into a small anteroom with the two aliens. This room had nine enclosures but each one was separated with solid walls. As she watched, the rooms were filled with one boy in each. There were four white boys, three black boys, an oriental boy and one which looked Middle Eastern. Each boy was sporting an erection. Stacy found herself studying each cock, noticing the different sizes. She didn't understand why but felt her body becoming aroused. Three girls were then moved into the room on their platforms. One, a white girl, appeared to be about 14. A black girl looked about 15, and the last was another black girl about 18. They were all positioned on their platforms so that their asses were higher than their heads and seemed to be about waist high.

The first three boys moved to the back of their enclosures and the girls' platforms were moved forward so that their asses were inside the enclosures but the rest of their bodies remained outside. At an apparent signal from the caretaker alien, all three boys moved up to the girls. Stacy watched in horror and fascination as each boy buried his cock into a girl's pussy. The youngest girl's eyes opened wide in apparent fright. The oldest girl showed no emotion and the other one's eyes showed what Stacy thought was pleasure. Stacy knew what intercourse was and knew it's mechanics but she had never seen it. She now found herself watching as three girls were getting fucked! The three boys' hips jutted back and forth as each pushed his erection deeply into the helpless girls.

Stacy felt a tingling sensation between her legs. She watched with excitement as one boy evidently climaxed. The boy soon backed away from the girl and exited out the rear of the  enclosure. Stacy was fascinated as she saw the once hard prick now soft and hanging loosely between the boy's legs. It was shinny with a mixture of cum and girl juices covering it. As the boy left, the girl was taken completely out of the enclosure and turned. Stacy saw the puffy lips of her pussy and a few drops of cum starting to ooze out. A plug similar to the plug in her ass only bigger was placed into her pussy and the girl was moved against the wall.

As the last boy finished and left, Stacy and the alien instructor also left. She asked the creature if the alien species had male and female. The alien explained that his species was much the same as hers. They had similar body parts but that the alien's parts were "stored" inside their skin instead of outside. The alien pointed out a faint line between its legs and told her that it was actually a pouch of sorts and there were  sex organs very much like a human's within the pouch. When aliens had intercourse, the pouches would open revealing the female's parts and the male's parts would extend out of the pouch. Female aliens had similar pouches on their chests which would contain breasts.

Stacy looked at the alien's chest. She couldn't see any marks and asked, "Are you male?"

"Yes," the alien answered.

Getting bolder and more curious, Stacy asked, "Do you have a penis?"

"Yes," the alien again replied.

"Can I see it?" Stacy cautiously requested.

"That is not possible," the alien explained. "My penis is only out when I am going to breed. Unlike human males, the penis of my kind remains covered when not in use. I have no way of exposing it unless I am going to breed."

Stacy pondered the point for a moment. She knew that her questions, from a human standpoint, were not "Proper" but the alien didn't seem bothered by them and her sexual curiosity was getting the best of her. "Have you ever bred?" she blurted.

"No," the alien answered. "I don't have a female companion as you have seen. There is no point of breeding without one."

Stacy thought about his answer. Evidently these aliens don't masturbate which explains why he was so interested in her sexual response when she was manipulated by him. She wondered whether or not it was better to be like him with no sexual desire or to be like her and burn with desire like she was now feeling. She decided she was the lucky one. Although she had the burn, the relief felt so good that it was worth it.

She was released from her platform as they entered the alien's quarters. Stacy almost ran to his chair and crouched down with her ass in the air. The alien set up her feeding tools and sat beside her. He pulled the plug out and pushed the tube in her ass. As he did, Stacy thought of the boys' hard cocks pushing into the girls' pussies. The alien placed the plug back into Stacy's ass and rested his hand in her back. Stacy tentatively moved her hand to his and slowly pushed it between her legs. "Do you need relief?" he asked.

"Yes," she moaned. "Desperately!"

"You humans are such a sexual species," the alien commented. "Very well, I shall take care of you, Pet."