My roommate, Seth, was studiously sexy.

Every shelf in our apartment overflowed with books on this type of science or that type of math. I couldn’t open a closet without seeing the spine of an advanced calculus textbook or a tome on interplanetary communications. Studying was Seth’s life. That was fine because I loved to study him. When he was bent over the kitchen table, curls in his eyes, glasses slipping down his nose, I found myself mentally tracing his features. He had a strong jaw, bright red hair and was damn fine-looking without seeming to know it. If he took those glasses off and stared at me the way he looked at his books, I would melt.

Up until last night, he only had eyes for science.

Fortunately, he had hands for something else. A little after midnight, I heard what were the unmistakable sounds of my roommate masturbating. There could be no other explanation for the squeak of the mattress and the muffled moans. I knew for a fact he was in there alone.

I sighed. I could tell he was trying to keep the noise low. I wondered if he had a pillow to groan into or if he was biting his palm.

I was equal parts aroused and curious about how he would look jerking off. Intense, I’d bet. If only I could see.

That’s when I had a wicked idea. I probably could see, I’d decided, if he’d left the door to the bathroom open slightly. The shared bathroom was between our two rooms. In the name of research, if nothing else, I ought to have a peek. Then I’d find out exactly how he handled himself. If he caught me peeking at him, I wondered if he’d buy “research” as an excuse for my being nosey.

I’m not a science major, but maybe some of his love of data was rubbing off on me. That is, where rubbing one out was concerned.

Quietly, I entered the bathroom through my door. I could hear him even better there. He was breathing hard, nearly panting. His door was open. That’s why I’d been able to hear him so clearly in my room. I started to touch myself. I couldn’t help it. I let my fingers dance over my pussy as I moved forward. My bare feet tiptoed as quietly as possible, but not, it turned out, quietly enough.

The sounds on the other side of the doorway stopped. He’d heard me! I didn’t know what to do, so I froze. Then the door opened all the way, and my roommate flicked the light switch on. He was totally naked with a fierce erection. I had a difficult time looking into his eyes and not at his impressive dick. I tried to imagine how I must look to Seth. I was standing there in my nightie with my hand in my panties, and I didn’t really have any way to talk myself out of the situation, other than to state the obvious: “Hi, Seth, I was just standing here listening to you masturbate when I decided to join in secretly.” Though I never said the words, my thought summed up the situation neatly.

I practically held my breath, waiting for what would happen next.

What really happened was simple. Seth tilted his head at me and nodded to my hand wedged inside my bikinis. I pulled my fingers away quickly and then stood there staring back at him with wet fingers.

“Show me yours, and I’ll show you mine,” he said.

Seth was already standing there with a naked erection that looked like it could break down walls. That seemed to count as showing me his. But then I got the drift of what he meant.

“Show you how I get off?” I asked to confirm my hunch.

“Exactly.”

“Where?”

“My room.”

We walked the few steps into his bedroom, and he sat on the mattress and waited for me. I felt insecure and on display. Of course, that’s because I was on display. “Usually,” I stammered, “I do the watching.”

“Really? So you’re a voyeur.”

“If you want to put a fancy name on it.”

“Do you watch people often?”

I shrugged. There I stood in my sheer nightie, my erect nipples poking against the fabric. My whole body felt alive and bright.

Slowly, I ran one hand along the length of my body. Seth watched hungrily, leaning forward to get a good, close look. I started to lift the hem of the nightie upward. He nodded, giving me the confidence to continue. I shucked my panties and kicked them aside. My pussy hair was trimmed, with a neat, little landing strip of fur right above my nether lips. I parted my lips with one hand and began to work my clit. My legs were trembling. I could feel Seth paying attention to every gesture I made, every subtle motion. My heart pounded in my ears.

“So you work slowly at first?” he asked, almost clinical-sounding, as if he might be taking notes for a research project.

“Don’t you?” I asked, pausing in mid rotation.

He shrugged. “Depends. Sometimes I go fast from the start.”

“Show me,” I insisted. I moved closer to his big bed with its rumpled sheets and piles of pillows.

“It helps to have a little…moisture,” he said.

“Oh, really?” I asked. “You’ve learned this in your experiences?”

He nodded. “Slickness adds to the pleasure.”

“Are you talking about lotion?”

“That’s one possible solution,” he said, “but there are others.”

His eyes fell on my mouth, then he looked down at his cock.

I got even closer to him, close enough to lick the tip of his dick — which was perfect because that’s what I wanted to do. I also wanted to wrap my lips around his bulbous head, taste the flavor of his pre-come, slip my tongue along the underside of his shaft, but before I did any of those things, I had to ask, “Would that be cheating?”

“What do you mean?”

“Well, I thought we were going to show each other what we like… I mean, how we like to touch ourselves. But now I’m going to be touching you…”

“I went to work immediately, slurping on his dick while he stroked my hair.”

“You are?”

“Well, sucking you with my mouth. And that sort of defeats the whole purpose, doesn’t it?”

“Why stick by rules?” he asked. “We can still watch each other. In fact, I’ll lay back and watch you blow me. Then you can take your turn in my spot and watch as I lick and suck your clit until you come.”

That sounded like an awesome plan. I went to work immediately, slurping on his dick while he stroked my hair and told me how great my lips and tongue felt. I couldn’t respond because my mouth was stuffed full of his rod, but his whispered words inspired me to suck him more intensely. As I upped my blowjob game, he released a nonstop series of helpless groans.

When I looked at his eyes, I saw a familiar expression on his face, like he was seriously studying me. Well, I would give him something to write about in his notebook. I sucked him with the type of vacuum power that would have left even the most loquacious lover speechless. Seth fell back against the bed, and I whipped my hair against him so that the tendrils tickled his thighs.

“Oh, yes!” he cried out when he found his voice. “That’s right, Candace! That’s perfect!”

In a heartbeat, he was filling my mouth with his cream. The results of our experiment were superb — and   quite delicious.

For a second or two, we were silent. Seth needed the time to regain his bearings. I hoped he’d remember what we’d discussed. First him, then me.

To my delight, he spun me around and locked his lips around my clit. My hot button was swollen and ready to bask in the glow of his attention. Blowing Seth had turned me.

I am far less studious than Seth. I didn’t pay attention to the hows or the whys of what he did with his lips and tongue. I simply floated on the pleasure he delivered, finding sweet bliss because of his sweet mouth. He held me to him, clutching my body as he licked me and kissed me all the way to a bed-shaking, body-quaking orgasm.

“What did it feel like to be the exhibitionist for once?” he asked afterward as I sprawled languidly in   his bed.

“Just once?” I teased. “Don’t you need to repeat an experiment to verify the results?”

“I love it when you talk science to me,” he said.

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