Your friend Diana calls you to the all-girl college she teaches at with an urgent request. She's teaching a sex ed class and she needs you to be a model. You're a little confused about what that means, so she explains that she needs to show her students how the male anatomy works. You feel a little hesitant, but you want to help Diana, and you're excited at the idea of a bunch of girls looking at you!

When you arrive at the classroom number she gave you, Diana meets you outside. She's dressed professionally, but her brown blouse still hugs her breasts in a way that excites you. Her dark hair is pulled back and she gives you a grateful smile.

"Thank you so much for doing this," Diana says, "The girls would have failed the class if they didn't have a model. They are really excited to meet you."

As she leads you in to the classroom you can't help but to check out her ass through her black dress pants. You find yourself wishing that she'd teach YOU sex ed.

The classroom is pretty small, only about 12 girls. Several of them instantly catch your eye, smiling curiously at you. Diana introduces you to the class.

"This is Joe! He's going to show you how the male sex organs work!" She turns to you and smiles shyly, "Joe, would you take your pants off for us please?"

Surprised, you pause for a moment, before realizing that this was part of the deal. You strip off your pants.

"This is Joe's penis! You can see that he's a tiny bit aroused already, or else he'd be smaller. Joe, will you please show us how hard you can get?"

**As you read the story, if there's a direction you'd like to see it go, but you don't feel like writing it, please suggest it in a comment. I enjoy a challenge!**