Teach class about arousal

"Given that this is a senior level course and the fact that you are all adults here, I don't think it's worth our time to identify basic secondary sex organs such as the breast, vagina, or penis." Ms. Welker begins. Sounds good to me, maybe this means there will be just a little less staring.

"So I decided that our models will demonstrate something that is incredibly important yet often overlooked when discussing sex. Of course I am referring to arousal, or being 'turned on' in laymen's terms. I'm sure all of you have been aroused at some point, hopefully many times as is healthy in young adults such as yourself. However, it is important to know the purpose, mechanisms, and driving factors of arousal to ensure..." I stop paying attention around here, because it's at this point where I notice Jason's... cock (it feels weird using this word!) for the first time. And boy, I could listen to Ms. Welker ramble on about arousal all day and would still have no way of comprehending how I feel at this moment.

Not that I have much experience with... cocks (I promise I'll try to be less awkward!), but nevertheless Jason's seemed to be perfect. Okay, maybe I'm biased because I have a huge crush on him, but still! Never have I gotten this turned on, this quickly in my entire life from just the SIGHT of a penis. Immediately it felt like floodgates opened inside my pussy that instantly made me wetter than I thought was possible.

Suddenly it's become more difficult to stand, and my legs start to shake. It then occurs to me that while I was dreaming about Jason's cock (getting easier every time now), the whole class was watching me the entire time!

Somehow I regain my composure enough to hear Ms. Welker's lesson again.

"But instead of listening to be talk about it the whole time, why don't we see for ourselves on our models? After all, it's what they are here for." Ms. Welker said.

Wait, what was she talking about again?

"Now as for Jason, we can plainly see his arousal due to the stiffening and lengthening of his penis, which makes for easier insertation into the vaginal canal."

The class (and myself as well) look at Jason's cock closely, to observe what Ms. Welker was talking about. Yet again, my vag somehow gets ridiculously wet just by the sight of it. I start to wonder what it would feel like inside of me until suddenly it's my turn to show the class.

"And while Jason's arousal is clearly visible, Emily's takes a more careful eye to notice. And besides the small amount of vaginal fluid dripping down her leg, it's still rather difficult to tell while she is standing up. Emily, would you mind hopping up on this desk here?"

Oh boy, here it is. If anyone couldn't see before, they're about to see it all now. In a way I'm kind of glad I'm so horny right now, because otherwise the embarrassment would be too much to handle. With... other things... on my mind, I barely even think about it when I climb up on the desk and face the class, my pussy glistening for all to see. Hell, I don't even wait for Ms. Welker to ask before spreading my legs, putting every inch of my completely naked pussy on full display.

"Thank you very much Emily. And if anyone is still unable to see, feel free to move closer to get a better view."

At that, everyone in the back couple rows shot up out of their seats and closed in on me.

"This is one of the most perfect examples of female arousal I've ever seen in my life. You should be in a textbook, Emily." Ms. Welker commented.

I'd hope so, because I've never been so perfectly aroused in my entire life. I don't even care about the dozens of phone cameras capturing pictures of me that would have been absolutely mortifying even earlier today. Even when I first agreed to be the model fifteen minutes ago I was worried that I would have to touch myself in front of my peers; now I'm worried that I won't get a chance for relief. It's almost unbelievable how in the span of a few short hours I went from practically going into shock when my classmates first saw me naked to casually putting my whole vagina on display.

Again Ms. Welker's voice brings me out of my daydreams and back into reality, as she moves on with the class.