Alien Exchange Program

by Lubrican

Chapters : 1 | 2 | 3 | 4 | 5-16 Available On

PLEASE NOTE: This is a preview of this novella. It is available for purchase in its entirety via

Chapter Four

Of course they didn't tell their parents they were going to teach each other how to masturbate. Who would? I mean it was a weird situation, but it wasn't that weird.

Hmmm. I'm just sitting here looking at that last sentence.

I guess it was as weird as something could ever get.

But they didn't tell their parents, which was pivotal, because if they had, I'm quite sure different decisions would have been made, which would have affected the future of the twins in very different ways.

Again, I'm babbling. I'll just cut to the chase again.

On the way home, Fran turned sideways in her seat and looked back at her children.

"You're going to have to spend as much time together as possible. You need to teach each other how to be each other before you go out in public.”

"We already are each other," said Craig.

"But you don't act like each other," argued Fran.

"How can I teach him to be me?" complained Carly.

"I don't know," admitted Fran. "But you have to. And he has to get you ready for when you run into Josh, and Tim and Brandon and all his other friends. And Craig, you know most of her friends, but not well enough to sit and engage in girl talk with them."

It was quiet in the back of the van as both teens tried to imagine what it was going to be like mixing with a whole new set of friends. Actually, they weren't "new" exactly, but it seemed like it, because, suddenly, the type of relationship was different than it had been. Carly thought about one of the boys her mother had named, Josh Green. He and Craig played tennis together, more or less regularly. He'd been over to the house half a dozen times, but not for long, because when Craig was ready, they went to the courts to play. He was cute. More than once she'd wished he'd ask her out. But that actually made her shy, so she never tried to talk to him while he was there. They smiled at each other in school, but that was it. Now, suddenly, she was going to be able to spend as much time with Josh as she wanted.

Except that she had no idea how to play tennis. And she had no idea what kind of things they had talked about ... what kind of things she should know about him.

"There's no way we're going to be able to pull this off," she said. "We've spent years developing friendships, and neither of us will ever be able to catch up on everything we should know. Maybe we should just move away and start all over."

"Be systematic about it," said Jack, looking in the rear view mirror. "You have three weeks left before school starts. We'll tell your friends that you both came down with something contagious, and that you have to be quarantined for weeks. Then the two of you will have all day to talk about each and every friend, and what each is like and all that kind of thing."

"We'd have to be joined at the hip to cover that much ground," complained Craig.

"Okay," said Jack. "Fine. You have to be joined at the hip. You're twins. You can pull this off. I'll move your bed into your sister's room. Each day you choose a couple of friends to educate each other about. Then, every night before you go to sleep, you can test each other on yesterday's friends, and drill each other on the ones you talked about before that. You have plenty of time to teach each other what you need to know if you apply yourselves.  Any inconsistencies or slips can be blamed on this unknown disease or something."

"You can't move his bed into my room," said Carly. "There's no room. If his bed was in there we'd have to crawl over them to get anywhere at all."

"I'll get a cot then," said Jack, undeterred.

"Dad, I have a queen bed," said Carly. "We can just sleep on that. We're only talking a couple of weeks. And we used to sleep in the same bed."

"Not since you were ten," said Fran. "Things have changed since then."

"Yeah," said Carly, dryly. "I used to think about penises once in a while. Now I have one."

Now it was quiet in the front seat for a while.

"She has a point," said Jack.

It was quiet a while longer.

"He has a point," said Fran, softly. "We're going to have to get used to this too. We can't slip up either."

Which is why, the first night they were back home, the twins ended up standing beside Carly's bed, contemplating getting into it with their new bodies. Both were thinking about what they'd already done, and what they'd already offered to do for each other.

And it had nothing to do with learning about their friends.

"This is weird," said Craig. He felt like that was his new motto. He was in what was now his room, except he had always known it as his sister's room. Her things were on the walls. Her brush was on the vanity. A pair of her panties was lying on the floor beside his feet.

Except this was now all his. Those panties were his.

Suddenly, he was crying. The emotions he was feeling seemed entirely new. They felt entirely new. He was grieving. He had, in a very real sense, lost someone. It wasn't to death, but it might as well have been. In another sense, it was like breaking up with someone you loved, and then seeing that person all the time. He was going to have to interact with that person on a daily basis and he wanted back what used to be, but he knew that could never be, and he grieved because of it.

"Hey," said his own voice, softer than usual, more caring than usual. She stepped toward him and took him in her arms. His arms. Except now they were being controlled by his sister. They weren't his any more. The ones he had control of went around his body automatically. His new hands didn't quite reach around her back, but her arms surrounded him. He suddenly felt safe, which was crazy, because it was his arms that were wrapped around him, and his arms that were making him feel safe.

But it was the body he was in that felt those arms, and melted against his old body, clinging to it while his new body sobbed. He felt frustration and embarrassment. He never cried like this. Girls cried like this.

"It's going to be okay," his deep voice assured him.

A strange thing happened. He still heard his voice, even if it sounded odd ... not quite right ... but he also heard Carly talking to him. It just felt like Carly, because it had been said in the same way Carly would have said it if they had never been switched.

"Easy for you to say," he mumbled into his own chest. "You're a guy now."

"I know," she said. "But I'm going to try to overcome that deficit."

He pushed his upper torso back and looked up. For some reason his attention was briefly drawn to the muscles under his hands, and how firm they felt. He'd felt his muscles before this, but it wasn't quite the same. Using her fingers made it feel different somehow. He stopped thinking about that and went back to the point he wanted to make.

"Deficit? It's not a deficit. You have it easy. Being a guy is easy."

"You think so?"

"Of course! It's being a girl that's impossible. I mean I've never watched you, but I know it takes you hours to get ready in the morning. All I do is get up, comb my hair, brush my teeth, put something on and I'm ready to go."

"It takes me fifteen minutes," said Carly. She frowned. "I'll teach you how to do it in fifteen minutes."

"It's still easier being a guy."

"I don't think so. I think it's incredibly complicated being a guy."


"Well, for one thing, your penis is acting up again."


"I have a boner, Craig."

"Right now?"

She ground his body against him and his body felt what was undeniably something big and firm. It was rubbing right at the point where, he knew, his sister had removed all the hair between her legs before he inherited her body. He felt that place deep in his new belly begin to hum, and the nipples on his new breasts seemed to somehow try to fold in on themselves. He pushed completely away from her.

"What the fuck?" His wonder was a product of both reactions, hers and his.

"Exactly," she said. "Why does your body get a boner when it hugs ... me?"

"I don't know," said Craig, softly. He was distracted by his nipples, which demanded to be squeezed. Except he wasn't going to do that in front of her. Himself. Whatever. He wondered, briefly, if this was going to drive him insane.

"Have you ever felt ... that way ... about me before?" she asked.

"Now hold on," he said, holding up a hand that was still too slim and too soft. "You're the one in my body right now. It's your brain working things. Maybe this is all about how you feel about yourself or something."

"I've never wanted to masturbate after looking at myself in the mirror," said Carly.

"Crap, Carly!" he groaned. "You can't say things like that!"

"Why not? This is what's happening. You heard Mom and Dad. We have to learn how to be who we are now. You don't have to deal with having this boner, but I do. And it would help if I could figure out why it's there."

"I told you. They just happen sometimes."

"This isn't the first time this has happened," she said. "That this body got a boner because of you, I mean."

"What are you talking about?"

"When we were hiking? That first day? I was behind you. I watched you walking. I got to see myself from a completely different perspective. For maybe the first time in my life I didn't pick my image apart. I was happy that my body looked like it looked. And then my new body got a boner. I told you about it ... remember?"

Craig blinked. He remembered that vividly.

"That was because of me?"

"Obviously. It was you I was watching. Remember? You asked me what I had been thinking about. Well, what I had been thinking about was that my body looked good. And now I hug you because you're crying like one of my girlfriends, and suddenly I'm all stiff in my pants again. So have you been perving out on me before this?"

"Of course not!" said Craig. "I mean sure, I've wished I could get a peek at you in the shower or whatever, but that's just because I've never gotten to see a naked girl. I'd like to see any girl naked. It's not like I lust after you or anything. Jeez, Carly, give me a break, here."

"I'd be happy to give you a break, but my body seems to want to give you a boner instead!"

Craig sat down on the edge of what was now his bed. It had a pink comforter on it. The thought of being surrounded by girl things for the rest of his life was suddenly depressing.

"It doesn't matter anyway," he said, softly.


"I said it doesn't matter. I am you now. So if some deep dark part of my mind thought you were hot, then all that means now is that I think I'm hot. And that body really does get erections for no reason at all. There's no point in worrying about it. Are we going to talk about our friends or not?"

"We are," she said. "And don't worry. I'm not all that freaked out. Remember I said I liked what I saw on that hiking trail. Maybe getting a hardon is just this body's way of expressing approval."

"I never quite thought of it that way," said Craig. "Usually, whenever that happened to me, I was paying more attention to hiding it than anything else."

"Interesting," said Carly, who sat down beside him. She giggled.

"What's so funny?" he asked.

"I was just thinking about all those guys at school, imagining all of them to be stiff, and trying to hide it. I'll never talk to another guy again without wondering if he's trying to hide a boner."

"Well don't ask them," said Craig. "You do and they're going to think you're gay."

Carly looked down at her body. She'd already grown used to the power in this body, the feeling of invincibility. In this body she could still approach her girlfriends ... still be friends with them, even if it was on a slightly different, weirder level. She glanced over at her old body. It really was going to be tough for Craig. If he used the same attitude with his friends as he had in the past, they'd think she was flirting with them. Knowing some of them, they'd try to put the move on him. And that would freak him out to the max.

"Maybe you're right," she said, softly.

"Which part?" he asked.

"About it being harder to be a girl than a guy."

"I know I'm right," he sighed.

"But I'll help you," she said.

"I hope so."

"I will. I'll help you any way I can. We're in this together."


She stood up and started taking off her clothes.

"We may as well go to bed. We have a lot of ground to cover, and I'd rather do it lying down than standing up."

"What about ...?" Craig looked meaningfully at her zipper.

"I thought you said you'd teach me how to make it get soft."

He blinked. Then he thought about that. He touched his cock all the time. It was no big deal. And just because he had different hands, that didn't change anything. Not really. It would be weird doing that and not being able to feel anything, but if she wasn't distracted by the boner, she'd be able to concentrate more on helping him keep his head above water in the ocean of estrogen he was going to have to live in from now on.

"Sure," he said. "No problem."

It was surprisingly odd, seeing his body become naked in front of him. He remembered her saying she'd checked her former body out on the trail and liked it. He'd been able to understand that because he'd always thought she was pretty cute. Not that he could admit that during that particular conversation. So now he looked at his own body as she bared it. He was mildly surprised to find that he thought he was pretty cute too. He'd never been satisfied with the condition of his muscles, always wishing they were bigger. But now that he could look at the whole package, he realized everything was in proportion. There was some definition on his arms and legs, and his abs looked better than he'd ever thought before.

Then he looked at his penis. Unlike most boys, he'd never stood in front of a mirror with an erection. It wasn't because he'd never thought about it. He just didn't have a full length mirror. There was one in his parents' bedroom, but he wasn't about to go in there and examine himself naked in it. So this was the first time he was able to look at his body in toto ... at his maleness as a complete package.

He approved. That ball of heat in his belly approved.

His nipples approved.

"You're staring," she said. Her hands came to cover the nipples on her chest. It was such a natural thing for a girl to do that he laughed.

"What?" She frowned, but didn't move her hands.

"You're covering the wrong part," he said.

She looked down. Slowly, she moved her hands to cover her new genitals.

"This feels weird," she said.

"Well, you look normal." He smiled. "For a guy, anyway."

"Gee, thanks."

"Can I ask you a question?"

She looked up. "While I'm naked?"

"It's appropriate," he said.


"Right now, I feel all funny right here." He pointed at his abdomen. "And my nipples feel itchy and I have this urge to squeeze them. It's kind of like feeling horny, except it's really different. So is this how girls feel when they like what they see ... or have you secretly been perving out for me?"

He watched the look of shock come over the face he was so familiar with. Her hands fell away from her groin and waved in the air, expressing her agitation.

"Need I remind you that it's your brain in my body?" she snapped. "If anybody is perving out, it's you!"

He grinned and pointed to the rigid penis that jutted from a nest of dark brown hair.

"My brain isn't in that body," he said, smugly.

"Yeah, but some of your perviness probably still is," she said, suddenly pouting.

"Maybe," he said. "It doesn't matter. We're stuck, and that is going to happen again." He pointed at her erection. "Lots of times. Trust me on that. So lie down on the bed and I'll show you what to do about it."

"Are you sure this is going to work?" Carly asked her brother.

"Trust me," he said, contemplating what had been his body, lying naked on the bed in front of him. "I know how to make that body happy."

As it turned out, though, it was equal parts easy and difficult.

Gripping his penis with his sister's hand felt different to his senses. But his penis itself felt familiar. Moving his hand in just the right way was easy. He knew how hard to squeeze and how fast to go. Quite suddenly, she was an avid and willing participant.

Her feedback was comical, because she writhed under his touch, moving and breathing hard. About all she could say at first was, "Wow! That feels good!" A few minutes later it became, "That feels fantastic, Craig!"

That was when the first problem surfaced. Craig was used to feeling things both with his hands and in his genitals. But now it was as if he was blind, or deaf, or something. He couldn't feel what she was feeling, and that was the part he needed to feel to know when to do things just so, and finish her off.

"You need to tell me when to speed up," he said, frowning.

"How do I know when to tell you that?" she panted, lifting her hips and then letting them sag back down.

"You should start feeling a pain, sort of inside your penis, except it's a really good pain, and that's when I need to speed up."

"It's already there," she panted. "It stings, all along the inside of your penis. My penis."

"Good. I was getting worried. It usually doesn't take this long."

He sped up, having to estimate things, and then the second problem reared its head.

He usually thought about some girl he wished he could see naked, or even fuck, as he came. But he couldn't tell her to do that. It wouldn't even work ... right? If that worked, that would mean she was a lesbian ... wouldn't it?

But that meant he had to tell her to think of a boy, and that just made him feel ill.

Still, it needed to be done. He clamped down on his emotions and spoke.

"Now, think of a cute guy, a guy you wish you could kiss ... or something." That was as far as he could go. He couldn't bring himself to say, "a guy you wish you could fuck."

"Who?" she gasped.

"I don't know!" he said, frustrated. "Somebody you wish was your boyfriend. Somebody you'd like to make out with."

"Okay ... Jerry Harrison!" she blurted.

"Don't tell me who it is," he groaned. "Just think about him."

She closed her eyes and he whaled on what had been his cock. He'd always liked Jerry, but now he wanted to throttle the guy. Part of that was because Jerry Harrison had, more than once, talked about what a hottie Carly was. In Craig's presence. He'd also proclaimed Craig to be lucky, because he had the kind of access to Carly that might let him see her naked.

It's possible that his anger about the idea of Jerry being with is sister naked helped him go as fast and violently as said sister needed to make her new penis spurt. It was also possible that Carly recognized the similarity between when she'd been about to have an orgasm as a girl, and having one as a boy.

Suddenly her eyes squinted and her mouth opened.

"Oh shit!" she gasped.

Semen shot into the air. Her eyes popped open and her mouth worked, fishlike, as amazement flowed over her face. She looked down as he continued stroking, knowing how to milk the organ in his hand. He wasn't happy about his cum getting all over the place, including his hand, but he knew she needed to know what it felt like to stroke things out to the end.

"Holy crap!" she moaned, and suddenly her hand came to touch his. He let go and she grasped what was now her penis. He saw what had been his hand slowly squeeze and move, experimentally, and saw immediately that she had already figured it out.

"There you go," he said, leaning back.

"Oh my gosh! That was intense!" she said.

"Now you know why I do it so much," he said.

"I wish I could do it again right now," she replied.

"Well, you have to wait a little while. On a good day I can get it up again in ten or fifteen minutes, but if you do that too many times in a row, it won't get hard for a whole day, or if it does it will be too sore to jerk on."

"Wouldn't that be good?" she asked, remembering how frustrating it was to have a boner most of the day.

"You want to go a whole day without feeling that?" he asked.

She blinked.

"I get your point," she said.

Suddenly she sat up. Strong hands reached for him and he felt himself being pulled off balance, against her. He felt weak and helpless as he was manhandled. Lips mashed to his cheek.

"Thank you, big brother," she said against his cheek.

Her breath was hot in his ear.

He felt those tingles start up in his middle again. He didn't over think it. He was used to being horny. And since it was his own body, or at least the body he used to inhabit that seemed to be making him horny, he didn't think of it as incest.

"My turn," he said, leaning back again and taking off his clothes.

By habit he tossed her his T shirt after he took it off, and said, "You can clean up with that."

He was confused when she snorted, derisively, and went to her bathroom, where she used a damp wash cloth instead.

"I don't know if what I had last night was an orgasm or not," he reminded her, as he lay down, naked. He spread his legs automatically, without even thinking about it.

"Trust me, I know how to make this body feel good too," she assured him.

She thought about the vibrator, only a few feet away, but decided to save that for later. She could tell he was a little freaked out that she masturbated at all. She thought that was funny, seeing as how his body got horny so easily. In the past, she had only felt the urge to ease that kind of tension a couple of times a week, at most.

"I'm going to have to lie down next to you to get my hand in the right orientation," she said.

He looked at her, and she saw her own, familiar eyes drop to focus on the penis that now was soft and spongy, but still felt delightful. That orgasm had been so intense, and so different, she was still amazed that her new body could feel something like that. And any time she wanted!

"I've never been with a naked boy when I did this," she said.

"Good," he responded, automatically.

"So how does your body feel, now that it's with a naked boy?"

"Weird," he said. "But horny. This is going to drive me crazy."

"You'll be fine. It's just me. You know me, even if I'm in your body."

"Just hurry up. I'm used to getting this over with in ten minutes or less."

"I take a lot longer than that," she said.

"I want to cum," he complained.

"Pay attention, then," she said.

She used her tried and true method, which involved using three fingers by sliding them sideways, back and forth across the top of her labia. That moved both the relatively loose skin of her upper labia back and forth, and bent and mauled her clit at the same time. It never failed to give her an orgasm, though she often stopped in the middle of things to press, and rub in circles, or insert a finger in her vagina or whatever. She liked to drag things out, because it felt so good.

But she knew that if she didn't stop, he'd get off.

She reacted to seeing what still looked to her eyes like her brother's hand, mauling the soft, bald skin she was so familiar with, in the same way he had. She saw his hand doing this, but she felt it with her senses. So it was a lot like doing it to herself, at least in her own mind. She didn't see it as incestuous at all.

And she had the same problem he had. She knew what to do, but couldn't feel the result in her belly, like she'd always been able to feel before. So, like him, she didn't know quite when and how much to speed up.

What saved her consisted of two things. The first was that, while she couldn't feel the sensations she was producing with her hand, she knew how hard to press, and that avoided the problem he'd had the night before in his sleeping bag, when he applied too much pressure. Second, the mind in the body being stimulated reacted like the male mind it was.

He wanted to have an orgasm. He needed to have that orgasm, on a very male level. And he did the same thing he always did when he wanted to cum. He thought about a girl, and made her naked in his mind, and then imagined having sex with her.

The orgasm, when it came, wasn't like anything he'd ever felt before. He was used to his penis getting closer and closer and closer to the critical point. At that point he could literally will himself to cum. But those sensations weren't present in this body. This body just felt good, and then it felt like there was something deep in his belly that was expanding, like a balloon. And it kept growing. His instincts kicked in and he gasped, "A little faster!"

When she complied, whipping thick, rough fingers across his clit, his hips lurched upwards without conscious control and that balloon inside him burst in an explosion that encompassed his entire upper torso. It was incredible. He was used to all that intense pleasure being concentrated in his penis and balls, but this ... this was like stepping naked from air conditioning into blazing sunlight. But it was more than that. It was so powerful that he couldn't think.

He just lay there and enjoyed it. Or felt like he was just lying there. Actually, his new body was flopping around as it came.

Carly leaned back, easing off on the clit she'd been rubbing so furiously. She knew it would be sensitive right now, in a way that was astonishingly like her new penis had felt after it spurted. As a little treat, she slid a finger into his vagina and wiggled it around a little bit. She knew how good that felt when she had done it before. It would feel even better with his thicker finger. Her eyes ranged over the flushed skin of her body's breasts, and how stiff her nipples were. So that's what it looked like when she came.

She was both startled and amazed when she realized her new penis was stiff again.

"We really should talk about our friends before we go to sleep," said Carly.

They were lying there, still naked. It didn't seem odd, because each saw what, to them, was their own body. Their breathing was normal now.

"Who do you want to talk about?" he asked.

She thought about it. In the body he now inhabited, he'd be hanging out with her friends. It was obvious that the bodies they were in now reacted to their thought patterns in ways that were different, and yet the same. She was likely, she was sure, to get boners when she was around guys she thought were cute. She didn't think the guys would notice. And if they did, they probably wouldn't think it was odd. They might even have boners themselves!

Suddenly she was curious about what had caused him to have erections in the past.

"Which of my friends have you ever gotten a boner for?" she asked.

He thought for a few seconds.

"Cindy Thurgood usually gets me going," he said.

"Really? Why?"

"She's got big titties," he said.

"They're called breasts," she said, her voice severe.

"She's got big breasts," he said, with exaggerated patience.

"Mine are just as big," she said.

She watched as he felt his breasts. The nipples had relaxed, but now they perked up again.

"I guess so," he said. He lifted his head. "This is so strange. I always wanted to see these, and now I can touch them! >”

"That is so pervy," she commented.

"Didn't you ever want to see my cock?"

"It's called a penis," she said.

"Yeah. Well, don't use that word when you're talking to my friends. They'll think you're strange."

"What should I call it?" she asked.

"Doesn't matter. Cock, prick, Johnson, woman's best friend. You can even make up a name. Just don't call it a penis. You can call some guy a penis, but you can't refer to your own by that name."

"Boys are so strange," she said.

"You're about to find out how strange boys are," he sighed.

"I can't wait," she said, sarcasm dripping from her voice.

"And don't look at any other guy's cock," said Craig.

"Exactly when would I have the opportunity to do something like that? Don't tell me you all get naked together and frolic around."

"What do you think gym class is all about?" he said, smiling.

"Oh, you mean in the showers," she said.

"Or in the bathroom, when you're standing next to somebody at the urinals."

"I never thought about that," she said.

"Well, don't ask me why it happens. I mean I know I'm not gay, but sometimes you want to check a guy out, just to see if he's bigger than you ... or something. Like I said, I can't explain it. But don't get caught doing it or they'll think you're gay."

"Why would you care if a guy is bigger than you?" she asked.

"Don't girls care if other girls have bitter tits ... I mean breasts?"

"Some do," she admitted. "Do guys all have different sized penises?"

"Cocks," he reminded her. "Actually, as far as I can tell, we're mostly about the same."

"Oh," she said. She didn't know what else to say. She imagined herself in the shower room with a bunch of boys she knew.

"What if I get a boner in the shower room?" she asked, suddenly nervous.

"Get the hell out fast," he said. "In fact, if I were you, I'd get wet and get out without looking at anybody."

"Why not just skip the shower completely?"

"You have to take a shower. The teacher checks. You get detention if you don't take a shower."

"Oh yeah. It's the same for the girls." She thought about that. "At least you won't have to worry about taking showers with the girls. You don't have a ... cock ... to get a boner with."

He grinned. "Yeah!" he said, enthusiastically. "I can stare as much as I want!"

"Don't stare too much," she warned. "Girls can make assumptions about your sexual preferences, just like the guys do."

"So what, if a girl thinks I'm a lesbian?" he said. "If she's cute, I might just let her seduce me."

"If you do that, I'm going to find a boy and play with his penis!" she threatened.

"Shit!" he said. "Never mind. Calm down. We can work this out."

"You'd better. That's my reputation you're playing around with."

"I know," he said. "We have to figure out some way to reverse this thing."

"When you find it, let me know," she said. "I'll be the first in line to get my body back."


<< Previous Chapter

Thank you for reading! If you enjoyed this preview and would like to read the rest of Alien Exchange Program,
click the Smashwords logo below to purchase it as an ebook for just $2.99.