Nick

You watch each student shift uncomfortably in their seat, not making eye contact.

"No takers?" You ask, looking at each boy, "Alright, Nick! Since you were late, you can be my little helper!"

While his mates laughed and gave him shit, he just muttered, complaining about being 'picked on'. Maybe I was picking on him, but it was his fault for being late. The cumfaced teen took his place in front of the class, standing there with cocky confidence and still silently joking with the other rugby players still at their seats.

"Nick," you look at the kid, admiring the cum that painted his features, "please strip for us."

"No way!" He yells, "I'm not gonna let those fags perv on me!"

He nodded towards some of the geeks in the front row. Despite what he said, his hands betray him, and in no time at all, he's standing buck naked in front of his male classmates. You notice he's covering his flaccid cock with his hands.

"Don't cover your dick," you order him, "that's one of the main parts of the course!"

He reluctantly moves his hands, displaying his impressive manhood to the class.

"Alright then, so this is what the average teenage males body looks like." You begin your lesson, "Obviously, Nick here works out, so some features, like his biceps and abdomen, are more enhanced. And obviously, you're all eighteen, so you're beating the end of puberty and not many more changes will happen. Now, you would've had sex ed in the past, where they've taught you about testosterone and your testicles and all that useless crap, but you probably haven't been taught much about the prostate."

"Actually, we've been told that it holds semen, and helps with ejaculations." One of the nerds, Sam, interrupted.

"Well, yes." You admit, "But, you probably haven't been told it's the g-spot of a man's body. See, everyone has heard of the girls g-spot and suspect only they have it, but men have one too, being the prostate. The reason for this is because the way to reach it, is through here."

At this point, you pat Nick's arse, making him jump slightly.

"Now a lot of men won't experience this, because they're too protective of their masculinity, but what's feminine about getting pleasure? Now, can I have someone come up and demonstrate this on Nick?"