Test the spray

"Uhh..." You have no idea what she's talking about. You like the idea that she thinks you're smart though. Already with half a stub from checking her out, you reach over and grab a bottle at random. "Go over the specifics for this one again for me, would you?"

"Of course, Doctor. That's the sensitivity spray. When applied to the skin, it heightens the nerve endings beneath and causes them to magnify their intensity. The working theory is that if applied to your fingertips, you could read print by touch. It has just been cleared for human trials." Your assistant dutifully reports. She doesn't look up from her clipboard.

You don't look up from her legs. As a result, you've only heard her last sentence. "So, no one's tried it yet?" You ask.

"No, Doctor. Shall I go fetch one of the trial subjects?" She start flipping through some pages.

"No need. Let's test it ourselves." You try to project some authority into that statement.

"Doctor?" Surprised, she finally looks up at you. Immediately, you squeeze the trigger aiming directly for her mouth. Your timing was off and you only got her lips. She gasps and starts sputtering, the clipboard falls to the floor.

"Come now, Dee. You're a professional. Tell me what you're feeling." You look at her with interest. You're genuinely curious about this.

Her eyes are watering and she's waving her hands over her face. "Doctor! How could you? How can I possibly record the details of the trial when...oh my!" She hesitates suddenly. She's moving her mouth, but not talking, like she's just testing it. "Doctor! Goodness! My lips are tingling. I can feel every breath of air. I can even feel the words leaving my mouth. This is amazing!" She smiles wide, then stops and tries to control her lips, but she can't seem to help it. "It feels good, too!" She's blushing, now.

Your press her for more, "How good?"

"Oh, it's like. Um. I'm not sure I can say." She's blushing even harder now. "It's almost like... No! It's unprofessional."

"We're both professionals here, Dee," you try to reassure her. "Besides, I need to know exactly what you're experiencing. For science, of course." You vaguely wonder if she's noticed the bulge in your pants.

"Of course-" she's panting now. "Of course, Doctor. Well, it's, um, like, someone is rubbing my pussy lips." She covers her mouth for a moment but that only makes it worse. You notice that her knees are pressed together now.

"Excellent! Well, that's progress. Let's do some testing, now, shall we?" You bring your hand to her lips. They're bright red, from lipstick or blushing, you can't tell. Slowly, you drag your thumb across her lower lip. "How does that feel?"

"Uuuhhhmmmm..." She's breathing hard. "Incredible, Doctor!" Her eyes roll back for a moment, then she remembers herself and her professionalism returns. "I mean, it felt pleasant and the sensation was definitely heightened, Doctor." You notice her hands are twitching, almost like she's trying not to reach beneath her lab coat.

"Well, let's find out just how sensitive it is!" This is the only warning you give her before grabbing the back of her head and pulling her to you, planting your lips onto hers. You deliberately, slowly drag your tongue across one lip and then the other. You suck her bottom lip into your mouth and gently nibble, holding it there just so you can run your tongue across it again.

The entire time, Dee is a mixture of groans and squeaks. Your hand on the back of her head is pretty much the only thing holding her up. When you finally break the seal, she falls to her knees with a long, husky groan of pleasure. She pants heavily for a while before she eventually speaks. "Fuck! Oh fuck! That was amazing." She looks up at you with shame in her eyes. "I'm sorry Doctor. I just orgasmed. I didn't mean to. Forgive me." She closes her eyes and leans her head back and just pants, trying to catch her breath.

You take the opportunity to spray her again, this time in her mouth, coating her tongue and throat. She gasps again when she realizes what you've done. She tries to look at you angrily, but every breath is taking her closer to another orgasm.

"Nothing to forgive. I hope you understand, this is for science after all." You start undoing your lab coat. When did you put that on? "While you're down there, I have another test subject for you." You get to the last button and free your rock hard member. You bounce it off her nose once and grin down at her.

There is no hesitation. She immediately takes your cock into her mouth. Upon doing so, she quivers as she is rocked with a wave of pleasure. She pumps her head once before stopping. "Doctor, my God!, it's like you're fucking my pussy!" She puts it back in her mouth and slurps you all the way to the base. Her tongue is going wild all over your shaft. You get the impression that it's more for her benefit than yours, but you don't mind at all.

She shudders again, your shaft deep in the back of throat. She's moaning into it. The vibrations feel amazing on your cock. They must feel just as good for her, too. She withdraws. "Doctor, I can't." She manages to get out between breaths. "It's too much. I'm sorry." Is she crying?

"Shh. Don't worry." You stroke her hair gently. "I'll take care of everything." Grabbing the back of her head, you push your cock deep into her throat again. She gags and her eyes roll to the back of her head. Both of her hands disappear beneath her lab coat and she starts working at herself furiously. You can hear her fingers squelching even over her ragged breaths and gagging.

No sense in letting her have all the fun. You repeatedly slam your cock into the back of her throat, trying to bounce your balls off her chin as often as you can. Her moans of pleasure only get louder until they become one long moan, building into a muffled scream. You pause, taking out your cock one more time.

"Please!" She gasps at you pleadingly. "Cum in my mouth! I want to feel your load in the back of my throat. Cum in me, Doctor!" Well, you certainly don't want to let the lady down.

You go back to ramming her face into you. You start bucking your hips as well. The entire time, her hands are toying with her cunt and her eyes are burning into yours, silently begging for your release. The whole scene is too much and you finally give her what she wants.

"YES!" you scream. You plunge your cock as deep as it will go, Dee pushing herself into you even without your help, and spurt gob after gob of sperm down her gullet.

When you're done, you let go and Dee drops to the floor, a dreamy look on her face. She's still swallowing your load and her legs are twitching involuntarily.

How long does this stuff last? You might just need to go again with her.