None of the girls volunteer.

Ms. Young sighs as Amanda approaches the front of the room. She stands a bit insecurely in her little schoolgirl outfit. Despite having just come, you feel stirrings in your cock while you think about all the things that you are aching to do to this girl.

"No volunteers." Ms. Young states, looking at the class again. "Fine, Heather! Veronica! Get up here!"

At the sound of Ms. Young's voice, the two girls who had been giggling to each other in the back of the class stand bolt upright. Sheepishly, they move through the maze of desks, towards the front of the room. Heather is a gorgeous little redhead, with smallish breasts, but dynamite curves. Veronica is more of the Betty Page type, with longish black hair, and large fully supported breasts beneath her schoolgirl jacket.

"Now then. For your extra credit, you three will be assisting in the insemination demonstration." Ms. Young explains to the lined up girls. "Come to the desk."

The three lovelies nervously approach. You note how several of them glance at your cock stirring under their eyes.

"Miz? He's not gonna, uhm, do what he did to Sarah, is he?" Veronica asks quietly as she stands next to the desk.

"No. I have something different in mind. Off with your panties, girls." Ms. Young commands.

With glances at Sarah, sitting at her seat, touching her stomach, the girls nervously comply, dropping their panties below their schoolgirl skirts. You don't really get to see anything, but the thought that all three are naked beneath the skirts is very nice indeed.

"Now, place your hands on the desk. You may not move them until this demonstration is complete." Ms. Young commands the three girls, before turning to the rest of the class. "In a single session, a male can impregnate as many women as times he can reach orgasm."

The look of shock on the girls faces as they realize exactly what Ms. Young has in mind is frightening.

"Now, our male subject," she gestures towards you, "Has reached orgasm once. Girls, are any of you on birth control?"

"No, miz." Heather speaks first, "I've never done it before either."

"My mom won't let me." Veronica sighs.

"I make my boyfriend use a condom. Could you please make him wear a condom, Miz Young?" Amanda sighs, looking back at your now fully erect member.

"That would defeat the purpose of this demonstration, wouldn't it Amanda?" Ms. Young turns back to the rest of the class.

"Now raise your hands at the answer you think is right. How many of you think he can impregnate one more girl?" A smattering of hands are raised. "Two more?" Considerably more hands are raised. "All three?" Only one or two girls raise their hands.

"Very well, Anyone who is right gets extra credit. I noted who guessed what." Ms. Young gestures to you. "Male selection of partners is crucial, so the male may select in which order he attempts to impregnate his female partners."

You grin, looking at the skirts that are presented before you. You throb, aching to possess all three of these girls. Should you take the virgin first, or show Amanda what defiance means? However, Veronica also seems attractive.