Megan was in the car with her professor. For the moment, the professor was ignoring her, focusing on getting the car out of the tight parking spot.
Megan's naked ass was directly on the leather seat. She could feel the leather sticking to her sweaty skin.
Megan looked down; the slutty schoolgirl skirt was around her waist, and with her legs straight, her slit was visible. The professor was still very focused on the road; ignoring her. She desperately wanted to touch herself. Just to run her finger along her outer lips. The last hour was so wild. Her entire class saw her naked. She was embarrassed and humiliated, and extremely turned on.
Trying not to draw any attention to herself, Megan casually moved her arms to her legs, moving her fingers to her inner thighs. The professor was still fully focused on driving. Megan moved her fingers a little closer, letting them glide smoothly along her skin. Subconsciously, she opened her legs a little more. Her fingers were just inches away.
"Megan" said the professor loudly, surprising Megan, and causing her to sit up straighter.
"You are clearly still very turned on. What is it about all this that's turning you on?"
Megan had her hands inches from her pussy. She needed touch herself, to fuck herself, but it would be so humiliating to do that in front of the professor.
After a moment of indecision and keeping her hands where they were, Megan hesitantly started speaking. "I don't know really, not exactly at least. It makes me feel seen, and sexy; alive; desired. Lust is also somehow mixed in. Seeing that look of lust on people's faces makes me so wet and knowing that I am responsible for it. It's like they are hungry for me. It's so primal. It's like a drug for me. I want it and need it. It makes me so horny, and I love that feeling."
"Why don't you spread your legs more" said the professor.
Megan immediately spread her legs as wide as she could. Her pussy was visible before, but now she looked obscene with her pussy fully on display.
"Unbutton all the buttons and open your shirt."
Megan did as she was told. She only had 2 buttons closed, so she quickly undid them, and spread her shirt wide open. She was now completely exposed. Anyone looking into the car would clearly see her tits and her wide-open pussy.
"Pull your lips open."
Megan could finally move her hands to her pussy. She gently took each of her outer labia lips - and pulled them apart.
The professor used that moment to reach out and pinch one of Megan's nipples, causing Megan to moan loudly.
"Masturbate."
Megan didn't need to be told twice. She immediately pushed two fingers inside herself and started a fast in and out motion. Her fingers were making wet slushing sounds every time they would push in. The professor continued toying with Megan's breasts, and teasing her nipples, sometimes pulling, and sometimes pinching, alternating between soft and rough.
Megan increased the pace of fucking herself. She was so close. She could feel it starting to build.
"Megan, we are here."
"Megan" repeated the professor. "You can stop now. We are here."
"Please, may I finish. I am so close" said Megan breathlessly, while furiously pushing her fingers in and out.
"Megan, that's enough. We need to go in. All your classmates are waiting."
Frustrated, Megan pulled her fingers out of her dripping wet pussy.
"Just lick your fingers" suggested the professor as Megan was starting to debate where to wipe them.
Megan sucked on her fingers tasting her juices for the second time today.
"I think you need to do that a few more times. There is too much wetness. It will leak down your leg."
Megan moved her fingers back insider her pussy, collecting her wetness, and then moved her fingers into her mouth. She repeated this a few more times, each time her fingers were dripping wet when she pulled them out of her pussy. Megan wasn't sure if this was reducing her wetness or making her even more wet.
"Alright, we need to go. Button up and straighten your skirt. We can't have you looking like a cheap whore."
Megan buttoned one button low down her shirt, which left most of her breasts visible. She pushed her skirt down from around her waist, trying to cover herself and attempt some kind of whorish modesty.
Megan and the professor walked into the adult store. The store was crowded. Looking around at all the familiar faces, her entire class came.
Lauren, the store manager, was the first to notice and great them.
"Megan, dear, I am so glad to see you. Your friends filled me in on the science experiment. We are so happy to support science."
Before Megan could figure out how to answer, the professor spoke.
"That's so wonderful to hear. Thank you. Sometimes it's so difficult to do proper scientific research. We have a real opportunity to further scientific knowledge today. What we would like to test is how far a nubile female will go to satisfy a sexual need. What I have been able to ascertain is that Megan responds to sexual stimuli related to public exposure, submission, and humiliation. "
"Yes, we have noticed the same. We were working on a program for Megan to gain more confidence in her sexuality - and those seem to be the kinks that most turn her on. We also did some work on measuring her current levels."
Lauren critically looked at Megan, as if she was mentally evaluating her.
"For deepthroating, she is at about 3.5 inches. And for her pussy, we've tested her at about 6 inches with a 2 inch girth. For her ass, she can do about 2 inches with less than a half inch radius."
Lauren made eye contact with Megan, as if she was speaking directly to her.
"The goal for Megan is to make sure that a cock can go all the way down her throat. She should be able to take an entire 7 inch cock or larger, and her lips need to be touching the balls. I would consider that a solid B performance. For an A, she needs to be able to handle a face fucking and deepthroating combo."
"What do you think. Do you think you can do it?" Lauren directly asked Megan.
"I will try" responded Megan mortified. Lauren was speaking loudly and everyone was listening to the conversation.
Satisfied with the answer, Lauren continued.
"For her pussy, we need to strengthen her pussy muscles. You know those black men. They have cocks like fucking horses. She needs to be able to take the entire black cock inside her. And for her ass, that's really disappointing. That's the least developed hole. I would give her ass a C minus."
Lauren again critically looked at Megan as if she was evaluating her.
"What would be a B grade is if she could take an average size white cock all the way in her ass. Let's say a standard 6 inch cock. Now, for an A+, I want to see her take a black bull cock into her ass, and at the same time, another black bull cock in her pussy. "
Megan was blushing. She could also feel herself becoming more aroused. She started imagining what a large black cock looks like; how it would feel inside her, filling her and stretching her. She looked at the table full of dildo's; her eyes immediately identifying the large black one. Megan couldn't help but fantasize how that monster would feel inside her. She shifted her legs, moving her thighs, trying to rub them together, momentarily forgetting where she was.