"Did you like it?" Gwendolyn wanted to know.

"Yes, it was very exciting," I said.

"But?" She could hear my reservation.

"But I... well, it felt like I was betraying you. I mean, when Marti was manipulating me. Getting turned on, performing for her. It helped to know you were watching. But I didn't know what you were thinking. What you were feeling."

"Oh, I loved it!" she grinned. "You looked so excited. And scared. Especially when you were scared. You were so helpless and so hard!"

We were finally alone together after spending an evening with Gwendolyn's landladies, her downstairs neighbors. Marti - Dr. Martha Metzler, a professor of English literature in her mid-sixties - had used me as the object of a B&D demonstration, her other area of specialization.

Afterwards, I had followed Gwendolyn up the stairs to her attic apartment naked, as usual, watching the swaying of her perfect ass beneath the short skirt of her summer dress, knowing her pussy was bare. I also knew she had been aroused; I could smell it.

My cock was erect, of course. Her scent aways has that effect. It had only deflated briefly in the cold air on the veranda after she had freed it from the chastity device Marti had imposed before fucking me. "There's my pretty cock!" she had exclaimed when it went from zero to two hundred millimeters in one point six seconds.

Now she was seated on her bed with me standing before her, my hands behind my back as she idly fondled my throbbing erection. She had changed out of her dress and was wearing one of the oversized tees she slept in.

"I liked what she did to you. Well, I didn't like how she made your cock disappear so much, but it was hot seeing your balls like that. Anyway, I got really wet watching her fuck you."

I groaned at the memory and at the way Gwendolyn's fingernails were trailing up the underside of my cock.

"I have no desire to do that myself, but it was such a turn on to watch! It made me feel like I do when I watch gay porn. And you know how hot that makes me."

Her hands slipped around me to fondle my ass cheeks. "Turn around," she said.

She bent me forward a little and spread my cheeks. I could feel the cool air on my sensitive pucker.

"Your 'boy pussy' she called it." She brushed her thumb over it. "How does it feel now?"

"Fine," I replied. "A little sensitive maybe."

She brushed over it again. I shivered.

"A little sensitive, for sure!" she said. I could hear her smile. "There would be cum in there if you got fucked by a real cock," she said dreamily.

I shivered again at the thought. I had eaten another man's cum for her. From her. Performing for her, pleasing her, excited me, especially as it excited her. I could just imagine how exciting it would be for her to watch a man fuck me.

She pressed a digit - her thumb? - into the tight center.

"Ooh, there's still some lube in there," she commented, twisting it as she pressed deeper. It felt tight, but not unwelcome, radiating tingles up into the root of my cock.

"How does that feel, baby?" she said softly, her breath warm in my ear.

"Mmm, it feels good," I replied, a little surprised.

"Maybe I need to get you a plug. Would you like to wear a plug in your ass for me?"

"For you?" I said, stalling as I pondered, imagining walking around campus, sitting in classes, with a constant fullness back there.

"Yes, if you want me to," I told her, not admitting the thrill I felt. "I want you to decide. I want it to belong to you, like my cock."

She shoved her thumb deep, making me moan. She leaned forward, pressing her hard nipples into my back.

"That's right, baby. Your ass belongs to me!"

She turned me back around and pulled me to my knees.

"Open," she commanded.

I sucked her thumb clean. It was slightly greasy and smelled of ass.

"Make me cum," she said. Her hand gripped my hair and guided my face between her thighs, to my favorite place in the whole world.

~*~*~*~*~

We met at the car after classes on Tuesday. "We're going shopping," she had told me at breakfast.

Aubrey's Adult Adventures was a seedy looking shop on the seedy side of town. Gwendolyn had done her research, though, and it had exactly what she wanted. We wandered the aisles, checking out the variety of kinky merchandise on display. There was a whole glass-top display case devoted to male chastity.

"Look at all these different shapes and sizes," she said. "Would you like to try them on?"

"Um, that one looks pretty scary," I said, pointing out one with little spiky teeth inside a metal frame. I couldn't even figure out how some of them worked.

Gwendolyn must have heard my trepidation, because she said, "Don't worry; I don't want it locked up. It's my cock. I want it where I can keep an eye on it!" She gave it a little squeeze the way she often did.

"Besides, these are for bad boys who can't keep their hands off of themselves. Or let other people play without permission." She pressed up against me, rubbing my now hard cock.

"But you're my good, obedient boy, aren't you?" I could feel her hard nipples poking into me as she pushed me against the case and stretched to kiss me, melting me with her fierce possessing tongue.

After checking out all the varieties of strap-ons and a mind-blowing array of dildoes, some super realistic and some in fantastical colors and shapes, we came to the butt-plug case. She picked one out, a substantial stainless steel plug with an imitation ruby in its stem.

"I can't wait to try it on you," she said happily while I paid the cashier, a bored looking middle aged man wearing a greasy toupee. He didn't react to what she said, but he kept an eye on the convex mirror as Gwendolyn perused the gay magazine aisle with me in tow on our way out. She stopped and pointed out some of the more provocative covers.

"You liked that one with the cowboy," she stated, back in the car. It wasn't a question.

I started the car. Had it been that obvious? The size and the beauty of the man's erect cock and the physicality of his toned body, wearing only chaps and a Stetson, had been quite arresting.

"I've never seen anything like that," I prevaricated. Seeing her observing me made me aware that I had unconsciously licked my lips.

"I think I want to see you suck cock," she said, watching me closely.

I said nothing. My face felt hot.

"That place used to have glory holes," she told me. "Do you know what those are?"

"Yes," I said. I'd heard of them.

"I'm going to find someplace I can take you and watch you suck. You'd like that, I think."

"You looked like you wanted to suck Marti's. But she stopped you. Did you? Were you going to put it in your mouth?"

"Yes..." I said, hesitating. "But that's different," I said. I was going to say that it was a dildo, not a cock, and anyway Marti was a woman, not a man. But it seemed irrelevant suddenly.

"Hmm," she said with a wry smile. "Real cocks give you cum to swallow."

I drove us back to campus so we could eat supper at the dining hall. We had both bought the semester dining pass, after all, and the food was okay, especially on Taco Tuesday.

Gwendolyn had a hand in my lap under the table, resting on my erection while we ate. A gentle reminder that it belongs to her, it's a gesture I've become accustomed to. She was playing the teasing game she liked, talking about lending me to other women around us. We had played it before and found it arousing for both of us.

"What about her?" she suggested, pointing out a tall girl with hairy legs. "Would you lick her armpits? I bet she doesn't shave them."

I tried to imagine it. It would be exciting, I was certain. "I would if you told me to," I said, playing my part.

"What about her asshole? How hairy do you think she is there?" she whispered excitedly.

"Do you want me to ask her to show us?" I suggested, making her laugh at my mock earnestness.

"I want you to ask that guy" - she pointed at a man entering the table area with his tray - "to sit with us."

I recognized him. This was the man I had singled out when Gwendolyn told me to choose a guy to fuck her. He was an older student with a neat beard and thinning dark hair. In jeans and a tight polo, he looked trim and fit.

I stood up and gestured toward the chair to my right as he approached. "Join us?" I said.

He glanced at me and lingered a moment on the vision of Gwendolyn. Most of the tables were occupied, but not all. There were other options.

"Sure. Thanks," he said in a pleasant baritone, taking the indicated seat opposite Gwendolyn, leaving the window side of the square table open.

"I'm Nate," he said to Gwendolyn and nodded at me to include me in his introduction.

"I'm Mike," I said, reaching out to shake hands. "And this is my girlfriend, Gwendolyn."

"Hi, Gwendolyn," he said, shaking hands with me and then with her. He said her name the way I do, like a mouthful to be savored.

"Hi, Nate," Gwendolyn returned brightly. "We've seen you here before. Mike thought it would be nice to meet you."

I was relieved that she hadn't said anything about my choosing him to fuck her. She was quite capable of that, I was sure. I blushed nevertheless and Gwendolyn gave me one of her knowing smiles.

"Are you an undergrad?" she asked politely.

"Yes, a sophomore, GI Bill, English major," he said between bites of taco. "You?" he countered, gesturing with his half taco to make the pronoun plural.

"Do you know Dr. Metzler?" Gwendolyn asked, referring to her landlady.

Nate nodded, swallowing. "I'm taking her Shakespeare class. Do you have her too?"

"No, she's my landlady, so we're getting to know her. Do you like her class?"

"Yes. Well, Shakespeare's pretty great anyway, but Metzler's lectures are amazing. Okay, we've only had two so far, but she's got some interesting takes I've never heard before. I like her a lot."

"We like her too," Gwendolyn replied. "A lot!" she added in an enigmatically pregnant tone.

"So, you're not English majors?" Nate asked, returning to his unanswered question.

"Sociology," said Gwendolyn. "Mike's History and pre-Law."

I liked Nate's style; he was engaging. "So, you're a veteran?" I asked, adding, "Thank you for your service."

"Air Force. Logistics. Two tours in Afghanistan."

"Wow," I said, wondering why he chose English.

Gwendolyn asked first. "So, English? What made you pick that?" I love her directness.

"I'm a writer," he answered simply, finishing his third and last taco. "It was my wife's idea. She thought reading more would improve my writing. I think I've got a great novel in me."

"Are you published?" Gwendolyn asked.

"Not really, just some short stories on the internet, nothing professional."

I pursued another line. "You're married? What does your wife do?"

"She in the Air Force still. Right now she's deployed, somewhere in the Middle East. Jordan, probably." He pushed his tray aside, having finished eating.

"You must miss her," I ventured, thinking how hard it would be to be separated from Gwendolyn. And we'd been together less than a week!

"Sure, but I write her every day. I send her installments on my stories. She expects at least five hundred words a day."

"Where would I find your stories on line?" asked Gwendolyn.

"Most of my work is on LushStories," he said, watching her reaction.

She raised her eyebrows and smiled. She turned to me. "I want you to return our trays."

"Yes, Gwendolyn," I said obediently. I got up to clear the table.

When I returned, Nate was saying, "... not at first, until I wrote one she really liked. She's the one who set up our profile and she handles the submissions. And she proofreads everything."

"Just your fantasies, or hers too?" she asked.

"Both. We have a lot of overlap. That's really how it started. Sharing stories we found. Knowing the other one would like it too."

"What kinds? I mean, like, what categories?"

"Mostly control-oriented stuff, like Mind Control and B&D. We like dominance and submission, power exchange, humiliation, slavery, stuff like that."

"We definitely need to check out your stories, don't we, Mike?"

I nodded. "Yes, Gwendolyn," I said. I could feel that I was blushing. I couldn't look at Nate.

"The first one we posted was loosely based on a girl Kyra met in basic. She taught Kyra how to dominate her. She wanted to be 'forced' to eat pussy and ass. We changed it in the story; made her into an officer that gets enslaved by a recruit."

"That sounds hot!" Gwendolyn grinned. "So Kyra is bisexual?"

"Yes. Bisexual and a switch. She likes to play with submissive girls. But she's mostly submissive with me." He grinned back. "But not always."

I could tell that Gwendolyn was turned on. I was close enough to detect the subtle change in her scent as her pussy was undoubtedly getting wet. And I could tell that Nate had noticed, as had I, that her nipples were stiff and pointed against the fabric of her shirt. That knowledge excited me.

Gwendolyn, with her hand still on my cock, had to know how I was feeling. I wondered if Nate had noticed that too.

"I know a little about dominance and submission," Gwendolyn said. Her eyes twinkled like they do when she's about to exercise her power.

"I'm not surprised," said Nate. "You've got that aura." He was staring at her intently.

I was proud of her and excited by the way she had monopolized his attention, leaving me a passive observer.

"Does Kyra allow you to play with other women?" she asked. My heart skipped a beat; I knew where this was heading.

"Not just women," was his answer. He grinned. "We talk or text every day. We keep no secrets."

"And her? What does she do when she's away from you for so long?"

"At the moment she has a female pet to play with, a young lieutenant. Kyra's only a staff sergeant, so dominating an officer adds to the dynamic."

"And who are you playing with 'at the moment?'" she asked.

"I haven't quite settled in yet," he said. "Still looking around, getting the lay of the land, so to speak." He held her challenging gaze steadily.

I was growing steadily anxious. My tacos weren't sitting so well in my stomach. But I watched Gwendolyn with a longing that could only be appeased by elevating her, by pleasing her any way I could.

"Mike has something he wants to ask you, don't you, Mike?" She gave my aching cock an encouraging squeeze.

So that's how it is, I thought. As it should be. Gwendolyn was making me do the work, to debase myself to another man. It should have shamed me, but I resolved to do her proud. I would prove that her pleasure meant more to me than my pride.

"Yes, Nate. I thought you looked like the kind of guy who knew how to give a girl a good and proper fucking." I had his undivided attention now.

"Would you fuck my girlfriend for me? I want to watch you make her come and fill her pussy with cum."

He was grinning at me. I glanced at Gwendolyn. She looked so pleased with me!

She squeezed my cock and slid her hand along its length, rubbing it. She gave a barely perceptible nod of her head, granting me permission.

I came in my pants for her.