This two-parter is in celebration of me being on 300 people's favorite author's list. To some people, that might not sound like a lot, but to me it's phenomenal. And Mrs. Cullen959 gave me this idea (which was used in "The Candle" also. lol).

Full summary: Edward is the biology teacher who has been lusting after one of his students all year. One day Bella forgets something in his classroom and has to go back after school has let out. Edward decides to teach her the reproductive system using very unorthodox methods. AH/AU/OOC.

This is very GRAPHIC, so if you can't handle it, don't read.

Part 1: The Male Reproductive System.

EPOV

I didn't see how I was going to survive another day with her in my class.

I was standing at the chalkboard. We were going over the reproductive system. Some of the students were giggling as if it was the funniest thing in the world. Others were blushing. One of those blushing students was Bella Swan. She sat in the front row, second desk from the right and she was staring directly at me as a dark pink blush spread over her face. She was wearing shorts since it was very warm outside – Forks was surprisingly hot near the summer – and I could see her very long legs.

Fuck.

I gritted my teeth and went back to talking about the female reproductive system. I made my mind get out of the gutter. Thousands of times I had imagined her bent over my desk in a short skirt, wearing no underwear. Sometimes she was laying on her back on one of the biology tables, completely naked while I fucked the shit out of her. Now, I growled lowly. I was going to have a tent in my pants if I didn't stop. And that was the last thing I wanted in front of a classroom of students – Mr Cullen getting horny because he's talking about the female reproductive system. What a nightmare.

"What are these folds called?" I asked, pointing to the diagram on the board. I pointed to the protective folds that covered the vagina and clitoris.

No one raised their hand.

"Is everyone shy?" I continued. "I have no doubt that at least one of you knows."

Nervous laughter trickled around the room.

Then Bella raised her hand.

I took a deep breath, glad that I had wore two pairs of boxers that morning. Ever since I had started this year, I had wore extra pairs of underwear around her. My cock seemed to have a mind of its own.

"Yes, Bella?"

She blushed darkly. "The labia?"

Fuck. "Very good." I turned back to the diagrams I had taped to the chalkboard; one was female and the other was male. What I wouldn't give to have her sucking my rock-hard cock. But I had to behave.

I finished the lesson up early, I couldn't endure it anymore. Every few seconds, I would wonder what she would look like, naked and spread for me. How she would react when I ate her out or how loud she would be when I fucked her. What she would look like with her pouty red lips around my dick.

The bell rang for the end of class. I was thankful that Bella's class was the last one for the day. But the thought of having to come back to this school tomorrow and sit through another day of horny thoughts nearly made me furious. Thoughts of her ruled my life. I was one of the only single teachers on campus and the other female teachers – sometimes even male – tried to get close to me. But none of them interested me.

I sat on my desk and tried to get control of myself. My erection was raging and couldn't be silenced. I was going to have a serious case of blue balls if I didn't do something about it soon. Walking to the door, I shut it, thankful that it automatically locked, and taped a piece of paper to the tiny square of glass that allowed people to see into the classroom. Then, I went back to my desk, this time sitting in my chair.

Quickly unbuckling my belt and undoing my pants, I let out my pulsing dick. I was grateful that Forks was not rich enough to install cameras in every classroom. Mine was one of the few that were overlooked. I slowly stroked my cock, biting my lip against the instant pleasure that coursed through me. Closing my eyes, I imagined it was Bella that stroking me, it was her fingernails that ran down my shaft. My motions quickened. I put my hands together in the shape of an O and began pumping myself. I went down quickly and up slowly, stopping at the head so that I could flick it with my fingernail. I gasped quietly.

"Mr. Cullen?" a soft voice said.

I froze. I would know that voice anywhere for it starred in my dreams often enough. I slowly turned my head so that I could look at whoever came in.

Shit, it was Bella.

She stood, frozen, in the doorway, her hand on the doorknob. I realized that the door was open and that I was still holding my cock.

"Close the door," I said swiftly, stuffing my still aching cock inside my pants. I hadn't released and my balls were screaming.

She quickly shut the door behind her, remaining in the classroom with me.

"How did you get in here?"

"The door wasn't closed all the way," she said, beginning to stutter in some places.

I closed my eyes slowly. Damn it, I had forgotten to check if the door was closed correctly.

"I f-f-forgot my notebook," she stuttered, her eyes wide. A dark blush spread over her face. I was sure that if I hadn't been so horny I would have been blushing too – the girl had just caught me masturbating like a teenage boy in the classroom.

I sat down heavily in my chair behind my desk. I could only hope to God that she didn't tell anyone about this. I would get fired or worse. I began riffling through some papers on my desk, ignoring her. She gathered her abandoned notebook in her arms and began to walk towards the door, but she stopped and slowly turned around, going to my desk.

"Mr Cullen," she began. "Is there anything I can do for you? I didn't mean to intrude earlier."

Her voice was soft and innocent, but fuck, her words were so erotic to me. Was there anything she could do for me? Hell yes, there were thousands of things I wanted her to do for me.

"Sit down, Miss Swan," I said, my voice stern as I gestured towards one of the student desks. She quickly sat down, crossing her legs. I took a deep breath. It wasn't her fault that I was so worked up. "I trust that you aren't going to tell anyone about this, are you?"

"No, Mr Cullen, I'm not going to tell anyone."

"Thank you. You may leave."

She got up but paused. I watched her, unable to do anything else. Why was she hesitating? Shouldn't she be running out of the room, having just seen one of her teachers masturbating?

"Mr Cullen?" she asked softly. She shifted nervously. "Um…would you mind if I stayed?"

That surprised me.

She blushed and looked down before setting her notebook down on my desk. I watched with tense muscles as she walked around my desk to stand before me. Suddenly, every ounce of desire I felt for this seventeen-year-old girl flared into a bonfire inside me. I couldn't stand her so close to me and not being able to touch her.

I grabbed her hips tightly in my hands and pushed her onto my desk, crushing my mouth to hers. In that moment, I didn't think about what she wanted or what I wanted. All I knew was that I needed her worse than any drug addict needed a fix. But her mouth opened willingly under mine and my tongue entered her mouth. There was nothing gentle about our kiss. She responded with as much fervor as me, knotting her hands painfully in my hair and battling with my tongue for dominance. Then she sucked deeply on my tongue and I about lost it. My erection was blazing in my pants, my balls clenching from lust.

When I broke away, I immediately moved my lips to her neck. Fuck, I wanted to give her a hickey. I wanted to mark her mine. I couldn't imagine what her parents would think, though, when they saw their daughter coming home from school with a hickey on her neck. I wondered if I could give her a hickey somewhere else, somewhere they would never see…

I positioned her on my desk so that she sat on the edge, her legs spread wide. I wondered if she was as virgin as she acted.

Her hands went to my pants, undoing them once again. I looked at her to find that her eyes were just as hungry as mine. But I backed away from her, leaving my pants unbuckled but my cock still hidden.

"Would you like the real lesson on the reproductive system?" I asked. My eyes ran over her body. Her chest was heaving with her ragged breathing and her legs were spread. She still wore those shorts though.

BPOV

I couldn't believe this was happening. It seemed like something out of one of my dreams that when I woke up I had to change my panties. Mr Edward Cullen was any woman's dream. He was tall and lithely muscled with messy bronze hair and electric green eyes. I remembered last week when he had come to my table because I was having trouble understanding one of the concepts behind chromosomes and genes. He had stood behind me, leaning on my desk with his left hand. I could smell his scent that made the place between my legs become very moist. He smelled like clean sheets and something earthy. The whole time he was trying to explain to me about dominant and recessive genes, all I could think about was what would happen if he touched my leg.

I spent my nights dreaming about him. I came up with numerous fantasies of us in his classroom and I always felt embarrassed when I woke up. He wouldn't want you, I told myself. Any woman could have him, why would he choose you?

Then I had accidentally walked in on him after class when he was…pleasuring himself. I was shocked, yes, but it also made butterflies of anticipation erupt throughout my stomach and my panties were suddenly wet. Now, as I sat on his desk after kissing him, I couldn't believe that this was actually happening.

"Would you like the real lesson on the reproductive system?" he asked calmly. My hands clutched the edge of the desk, my knuckles white as I struggled to slow my breathing. I didn't think I could frame a coherent sentence so I just stayed silent.

He smirked wickedly, moving towards me and my heart sped erratically. My eyes widened as he began to pull down his pants and boxers a little, so that his very hard penis could be let out. He glanced towards the door to make sure it was shut and that the tiny window was still blocked by the piece of paper.

I had seen his penis for only a second when I came into the room, but he had quickly put himself into his pants. Now, I saw him in full view. And he was very, very hard.

I glanced up at him to find Mr Cullen's eyes staring into mine with a look that melted my bones and caused a small moan to slip past my lips.

"Do you know what causes a penis to become hard, Miss Swan?" he asked, taking my hand from the desk to place it on his cock. I felt the muscles of his member twitch slightly under my hand before tensing tightly.

I could barely speak. "Arousal," I squeaked.

"When blood rushes into it," he answered. He ran my hand to the head of his dick. His skin was hot under mine and I wondered what it would feel like if it scorched me in other places. My eyes were locked onto his hard dick. He curled my fingers so that I was cupping the head of his cock. I watched as a small bit of liquid appeared on the head. "Do you know what this is?" He wiped off the liquid with his own finger and put it to my lips.

Looking into his eyes, I took his hand in mine and put his finger into my mouth, sucking on the digit and curled my tongue around it. He closed his eyes, a low groan rumbling through his throat. I smiled, nipping at his finger with my teeth before I pulled it out of my mouth. His eyes, when they opened, were dark with desire.

"Tell me what it is, Miss Swan," he ordered.

"Pre-cum," I said.

I was going to have to change my panties when I got home. Then he brought my hand to his cock once more.

"Where is the scrotum?" he asked, his voice tight. I had been paying attention today in class to everything, the sound of his voice when he went over the male and female reproductive parts, the way there was a subtle change in the way his pants fit him after we were done with the lesson.

In answer, I ran my hand down his cock to the base, moving south so that I could cup his balls in my hand. I squeezed a little, enjoying the way his cock twitched.

"Very good," he groaned, his voice sending shivers deep into my core. I moved my hand back to his member and squeezed, pulling him towards me with it. He growled darkly, his hands closing over mine. "Get on your knees and suck me off."

I was nearly soaked through to my shorts now. I got onto my knees on the tile floor and pushed him against the blackboard. I might be a virgin but I had given blowjobs before. I hoped that I pleased him. With his back pressed against the board, I slowly closed my mouth over the head of his dick. He gasped slightly, his hands knotting in my hair.

"Fuck, Bella," he growled. It was the first time he had ever called me by my first name and it sent waves of anticipation straight into my center. I curled my hands around the base of his cock while I sucked on the head, scraping my teeth lightly over it. I kept my eyes wide open, wanting to see all of his pleasure. I put more of him into my mouth, relaxing my throat so that I could get nearly all of him into my mouth.

I curled my tongue around his shaft and pulled back so that he pulled out of my mouth. My right hand squeezed and worked his balls while I pumped his dick with my left. I plugged the slit in the head of his dick with my tongue, licking out the bud of pre-cum that leaked out. He threw his head back, his chest heaving as his hands tightened almost painfully in my hair. I filled my mouth with him once again, scraping my teeth lightly down his entire length. He bucked his hips into my mouth, making his cock hit the back of my throat. I relaxed my throat so that I didn't gag.

"Oh shit, Miss Swan," he hissed when I sucked hard on his cock. Then I moved my lips to his balls, kissing each one before flicking them with my fingernail. "Fucking shit, I'm going to cum," he warned.

I put his pulsing dick back into my mouth and pumped him hard with my hands while I sucked his length.

With a deep, shuddering groan he released into my mouth in three spurts. I quickly swallowed each one, moaning. He tasted phenomenal. I licked up the excess that was on his member, and placed a quick kiss on the head before I stood up.

He was still for a moment before he pushed me back onto his desk. Mr Cullen quickly unbuttoned my shorts before yanking them down my legs. I lay flat on my back and moaned. He sucked my cunt through my panties and my eyes rolled back in my head from the pleasure. I knew I had to be quiet but that was going to be hard to do.

"Now it's time for you to properly learn the female system," he said, ripping my panties from my body. The tearing fabric almost hurt, but it mostly inflamed my skin. My juices poured from my core. I opened my eyes to see that he was staring at the place between my legs with a stare dark with lust. He pushed my thighs apart and bent them so that my feet were perched on the edge of the desk with my rear also on the edge.

He took my hips in his hands tightly and lifted them off the table so that he didn't have to bend down so far. Then my biology teacher began sucking my pussy so hard that I had to bite back the scream that threatened to fill the room.

The next chapter is part 2: The Female Reproductive System.

Hope you liked the first chapter of this two-parter!!!

Review? :D

-Oriana