Primary sexual organ

"The next part of the lesson is going to be the most complicated, by far. And the most important. You will all have to pay close attention, whether you are a boy or a girl. Everyone can learn something here, and it will be important for everyone at some point."

Anna gulped. She knew what this meant. She would likely have to spread her legs, and reveal her most intimate parts, for the whole class...

"For this, I'll have to get some more material."

Confused, the naked girl watched Mr. Jones disappear into the storage room. Was it already time for the dildo, the grand finale?

She was mistaken. When he returned, he had a pillow under one arm, and under the other two... weird looking things, looking a little like adjustable desk lamps, but with some kind of manacle on top? The pillow he placed behind her, and what the other stuff was became clear as he fixed them to the edges of the desk on either side of her.

Stirrups. They were stirrups, like a gynecologist uses them. Mr. Jones planned to _really _spread her open. In the most humiliating way possible.

"Please lay down on the pillow now, Anna."

Completely numb, she followed his orders. She was in no way prepared for this. The teacher proceeded to secure her feet, first one side, then the other. Finally, he adjusted the stirrups to spread her legs open. Wide. Constantly asking if she could still bear it. Anna was compliant, and only said stop when she really couldn't go further.

Mr. Jones stepped aside, and the class was given a perfect look at her most private place. But not perfect enough, apparently.

"Could everyone who isn't sitting in the middle of the first row please come to the front, and form a half circle? I want everyone to get a close look."

Chairs were pushed back, feet shuffled on the floor. The class assembled directly in front of her display, everyone staring directly at her folds. But it was still not enough.

"This will allow us to get an even closer look", Mr. Jones said, as he rushed to the storage room again, and came back with something that looked like a video camera, but with an oversized screen. He fixed it in place on the little desk space that was left between Anna's legs. It pointed directly at her nether regions. He flipped a switch, and the eyes of the students went wide. They were being treated to a view of the girl's pussy that was as detailed as it could possibly get. At the end of this, they would know her privates better than Anna was ever likely to herself.