The day was finally here. Today would be the day that Carla would find out if she had been accepted into her university’s graduate research program and which professor she would be matched with. It was the end of a long, stressful road full of interviews and exams. She felt she had performed pretty well on everything and was hoping for one of the more prestigious assignments. 

Maybe even more excited that she was, Carla’s boyfriend, Rich, was convinced tonight would finally be the night they got back in bed. Carla was so stressed and busy over the past three months that she had not had time for any sort of intimacy. Rich understood and was supportive but for every day that passed, he felt himself getting more and more desperate. 

Carla had similar thoughts. It wasn't that she didn’t like sex, she just had a lot on her mind. Suddenly, she remembered how long it had been and made a decision that tonight would be a celebration for her and a reward for Rich. As she was getting ready to head to campus, she leaned down and kissed Rich, who was awake but still in bed.

The kiss was slow and Carla slipped in just a bit of tongue. She always kissed him goodbye but wanted this one to send a message. She was only partially dressed. She was hoping that the kiss and seeing her in just a bra and jeans would have the intended effect. Rich was already struggling to make his morning wood go away, but that was going to make it last even longer!

“Are you sure you have to go?” Rich said, trying to pull her back into bed after the kiss.

“Yes, you know I have to go. This is the big day. I can’t be late for my meeting with the psychology department! I promise to make it up to you later though,” she replied, giving him a wink.

With that, Carla threw on a blouse and left the bedroom and got the rest of her stuff. The ride to the university seemed to take longer than usual. Every minute felt like an hour. When she finally arrived, Carla waited in the lobby for my program advisor to come get her. After a few minutes, she arrived and greeted me. Her advisor, Sharon, could tell she was anxious and didn’t waste any time getting to the point.

“Well, Carla, I’m sure you are curious, so I’ll get right to it. You performed extremely well in your interviews, and the only issue we had placing you into a research role was having multiple professors wanting to work with you!” The advisor explained to her.

“Oh my gosh - that’s crazy! I’m flattered - who will I be work with?” Carla said, trying to contain her excitement.

“You’ll be working with Dr. Fabor, who is one of the most respected Psych professors in the country,” she continued.

“Dr. Fabor? Oh my god! He’s a legend. When will I get to meet him?” Carla replied.

“Actually, you won’t have to wait long at all. He has been waiting for the right assistant for months and has requested to meet you immediately following this appointment so you can get started,” Sharon told her.

The two chatted for a few more minutes about the details of the position, such as payment and a class schedule, but Carla could barely pay attention. She was just too excited to meet Dr. Fabor. Finally, they wrapped things up and Sharon pointed her in the direction of Dr. Fabor’s office.

She walked down the long hallway and finally arrived at an office with Dr. Fabor’s name on the door. She took a deep breath to steady herself and knocked. She only had to wait about five seconds before the door swung open and she was face to face with a short man in his fifties. She had only seen his face in books and magazines before so she was surprised by his short stature.

“Hello, hello! You must be Carla. Please, come in. Sit down. Let’s get started!” Dr. Fabor greeted her. 

She nervously entered and sat down in the chair across from his desk. His office was messy, with papers and books covering every surface. The books varied in topic but most seemed to be focused on biology and psychology, which was not surprising. What was surprising was the fact that nearly all of them dealt with some form of sexuality - from arousal and attraction to the physical effects of orgasms.

Carla pretended not to notice and tried to remain confident and mature, but she was a little bit uncomfortable. Dr. Fabor shut the door and sat down behind his desk. They made small talk for a few minute before getting to what she would be working on this year as his assistant.

“As you have probably noticed, I’ve been doing a lot of research on human sexuality,” he said, gesturing to the books around the office. “More specifically, I am interested in the female experience when it comes to intercourse,” he continued.

“Oh, that sounds so interesting!” Carla said, still not quite sure how she felt, but wanting to appear excited.

“Indeed. Now, as my assistant, you will be helping me collect data on the subject through experiments. Are you comfortable with the topic of sex? I need to know you will be able to handle what we are about to tackle.”

“Yes, I will be perfectly capable. What sorts of experiments will I be conducting?” Carla asked.

“Good! We’ll get into specifics shortly, but I have some questions for you first,” Dr. Fabor said. “Some will seem obvious but I need to be thorough so please just answer honestly and we can get through this part quickly.

“How tall are you?”

“Five-foot-four.”

“Weight?”

“One-hundred and twenty pounds or so…”

“Ethnicity?”

“White, Jewish.”

“Breast size?”

“34C.”

“Waist size?”

“I wear a size two.”

“Natural hair color?”

“Dark brown - just like it is now”

“Are you a virgin?”

“No,” Carla answered, slightly embarrassed and nervous that would be a requirement.

“Good - how many partners have you had?”

“Three.”

“Are you currently in a sexual relationship?”

“Yes.”

“When is the last time you had intercourse?”

“It’s been almost three months. I’ve been pretty busy lately with school!”

“Excellent. We wouldn’t want you too active during this research. Do you reach orgasm when you have intercourse?”

“Most of the time.”

“Through clitoral stimulation or penetration?”

“Both I guess? Sometimes I need both if penetration isn’t doing the trick.” 

“Do you masturbate?”

“Yes.” She blushed.

“How often?”

“Maybe once per week?”

“Do you use a device?”

“No. Just my fingers.”

“Do you enjoy sex?” 

“Yes.”

“Are you on birth control?”

“Yes - I have an IUD.”

“Finally, are you willing to engage in intercourse for the purposes of this research?”

She paused, the words he just spoke took a second to set in.

“Excuse me? Like actual sex?”

“Yes - sorry if that was blunt. I would like you to be personally involved. As a researcher, you would have a specific viewpoint that would prove valuable. It would require you to have sex with three men over the course of two weeks. Is that something you could handle? No pressure. I can always find another job for you and get someone else for this,” Dr. Fabor clarified.

Not wanting to look like she was afraid and undedicated, Carla steadied her voice and agreed that she would be willing. She was terrified, though.

“What is the experiment focused on?” she asked.

“Great! I’m so happy to hear I’ve found the perfect assistant! We will be scientifically answering one of the oldest questions in the world when it comes to intercourse: does size matter? You will oversee a series of experiments conducted with women ranging in age from eighteen to 40. You will also be filling the role of participant. That means you will be collecting first-hand data on the effects of different sized penises.” 

Dr. Fabor continued his explanation, telling her the different methods that would be used to measure and analyze. Carla’s head was spinning as he explained everything. She had to admit that it was interesting work but it didn’t make her any less nervous. Her thoughts wandered and she couldn’t help but think of how she would explain this to Rich.

“I’m sure you are probably asking yourself why this has to be conducted with a real man and not toys. Well, I’ve found that there is such a vast difference between the experience of having intercourse and using a toy. Lastly, you may not have sex outside the experiment until your role is complete. Is that clear?” he asked.

“Yes, my boyfriend might not like it, but anything for the sake of science!” she said back to Dr. Fabor.

“Now - I’d like to start in three days. One of my calculations suggests that three days is the perfect period of abstaining from sex to achieve the most ideal reactions.

“Oh that’s perfect, Dr. Fabor! I promised my boyfriend some fun tonight so that will allow for the three days,” Carla told him, relieved that she could have sex tonight and not disappoint Rich.

“Not exactly. As I am unfamiliar with your boyfriend and the types of intercourse you have with him, I cannot allow that. I’d like to establish my own baseline response for you and show you the process for a successful experiment. I also think it’s important to get this out of the way now. We will be discussing sex so often that I do not want any discomfort. Intercourse removes that since we will have already experienced each other.”

Carla was shocked. Could she go through with this? Was this some kind of test?

“Okay. If you think that’s best, them I am in,” she replied, again, trying to sound like she was approaching this as a scientist and not a scared twenth three year old girl.

“Very well. Please lock the door and disrobe,” he ordered.

Carla stood up trying to hide the fact that she was nervously trembling. The next few moments were a blur as the adrenaline was pumping through her. She removed her clothes, quickly and efficiently. First her shirt, then her jeans, then the bra, and lastly her panties were removed, leaving her standing naked in the bright lights of Dr. Fabor’s office.

As she did so, Dr. Fabor unceremoniously removed his pants and underwear, but kept his shirt on. His soft penis hung down over his heavy looking balls. Carla saw the it was neither large, nor small. It looked to be perfectly average. As he stood looking at Carla’s naked body, his penis came to life, slowly stiffening.

Soon, he approached her and gently pulled her hand to his stiff cock. She took the hint and slowly stroked him as he explained how the experiment would run.

“This will be fairly simple as we want it to seem somewhat natural but still remove as many variables as possible. First, I will stimulate your clitoris for exactly one minute. Next, you will fellate me for exactly two minutes. Steps one and two will ensure some level of arousal.”

The talk made Carla aware of her own arousal and suddenly noticed that her vagina was very wet already. It made her a bit embarrassed, but she hoped he would see it as a positive.

“For the intercourse, we will go through three common positions: man on top, man behind, woman on top. Each position will have 125 strokes - fifty slow and seventy five fast. This will eliminate the different styles some men naturally have. This cycle will be repeated until you achieve an orgasm. The fastest recorded time will establish which penis size is the most effective. Does this make sense?” He finished explaining.

“Yes - it makes perfect sense. Should be get started?” Carla asked.

“Excellent idea.” He agreed.

Dr. Fabor asked Carla to have a seat on the couch and he sat down next to her. Reaching between her legs, he parted her wet lips and found her clit. Carla moaned as he found his target and began rubbing the little nub with his middle finger. She was more aroused than she had realized and his touch sent shockwaves through her. It had been so long since she’d been touched that even a strange situation like this had her on the edge.

A minute went by very quickly and it was time for her to suck his penis. Dr. Fabor stood in front of her and presented his half-hard cock. It was roughly six inches long, maybe a little shorter, and not very thick when it reached its full hardness. Carla took him into her mouth and began working her tongue all around the head. He had a different taste than Rich - not quite sour or musky, but certainly not completely fresh. Another difference was that he almost immediately began leaking precum. This was not something she had ever experienced before. It had a salty taste but more mild than actual cum.

She was trying very hard to remain professional, or at least as professional as possible when a young woman has a cock in her mouth. She was completely aroused but didn’t want her emotions to get the best of her. She wanted to treat this as a scientific event. The two minutes flew by and soon Dr. Fabor was tapping her on the shoulder and reminding her that it was time to move on the the next phase.

Carla leaned back and spread her legs to allow Dr. Fabor access to her wet canal. Dr. Fabor got down on his knees between her legs and his hard cock was now level with her opening. He placed the head at the entrance and pushed forward. He slid in slowly and easily. He was thrusting slowly to allow her to get used to the penetration. He was in charge of counting strokes so that Carla could focus on the sensations. Soon, he hit fifty strokes and picked up his pace. 

Carla felt great. She felt the slow build of a much-needed orgasm. Suddenly, he stopped and it was time for her to turn over and get taken from behind. Dr. Favor was now standing while Carla was on her hands and knees on the couch with her ass in the air. 

He lined himself up again and pushed inside. The new angle felt great for Carla, she loved the way his cock felt in this position. The slow strokes were doing their job of building Carla’s orgasm. After fifty strokes, he sped up and began slamming into her. She was shocked that an older man could fuck her so hard. Her orgasm was slowly approaching and she was excited to finally have that feeling wash over her. Just as she was really getting into this position, Dr. Fabor pulled out and sat down on the couch with his hard cock pointing straight up, shining with her juices.

Carefully, she swung her leg over him and lowered herself onto his dick. It felt good to have him back inside and she slowly rode him up and down. She was very conscious that she was in control now and needed to not get carried away trying to get off. This was an experiment. She then sped up her gyrations and before she knew it, it was time to switch back to missionary.

The next fifteen minutes or so were incredible but frustrating. They alternated positions so it was tough for Carla’s orgasm to build quickly. She wanted to cum so badly that she was going crazy. From missionary, to doggy style, to cowgirl - Carla focused on herself as much as possible and felt it finally building to the point that her climax was inevitable. The next rotation would put her on top and in control of setting off her orgasm by riding his shocking hard cock.

She felt the need to get him back inside her and straddled him quickly so as to finish off her orgasm. Dr. Fabor reminded her that she had to take it easy for the first fifty strokes. She was a bit frustrated and wanted to fuck him as hard as possible to push herself over the orgasm cliff. The slow strokes were excruciating for Carla. She wanted to cum so badly but this was doing nothing but keeping her on the edge.

“Okay, Carla. That’s fifty. The next seventy five will need to be faster,” he told her.

Carla needed no further instruction and began riding him as hard as she could. Her hips bounced and gyrated as she took him inside over and over again. She knew it wouldn't take much but within seconds she felt the first tremor of an incredible orgasm beginning. 

“Oh shit! I’m cumming!” she yelled loudly, momentarily forgetting that they were in an office of the psychology department during normal business hours.

Dr. Fabor stopped the timer he had been holding the entire time. Meanwhile, Carla’s orgasm was still going on. She shook and moaned as she creamed all over his hard cock. Her pussy spasmed and squeezed him tightly as she rode out the last aftershocks of her mighty orgasm.

Completely spent, she rolled off of him onto the couch.

“Oh no, you still need to cum!” she said, looked at his hard cock, soaked with her secretions.

“No, no. This is science, remember?” he said. “That was not about us having intercourse. It was about establishing a baseline of what is necessary for you to achieve an orgasm. I’ve trained myself to go hours if necessary, and I do not do it for the orgasm. I’ll take care of this when you leave, dear.” 

He stood and wiped off his cock with a wet wipe before stepping back into his pants and pulling them up.

“By the way, how long did it take?” she asked.

“Twenty-eight minutes and sixteen seconds. Very good, young lady,” he answered, proudly.

Carla was amazed at how business-like he was and how he could separate sex and passion like that. She just came like a whore on his cock and all he cared about was how long it took. No one she ever slept with could last more than five minutes and he could have kept going if he needed to. Unreal!

She was curious to see how the rest of this would play out. Fucking an old man in an office for the sake of science was one thing. But a stranger? How would Rich take this? Could I even tell him? Time would tell. Anything for science!