Nude modeling, of course.

For a brief moment, Paul was convinced that today was his lucky day. The chance to earn serious extra credit in his hardest class didn’t come along often, after all! But then Ms. Robinson spoke again, and he realized things were going to be a lot more complicated than he had expected.

“Excellent, Paul. I’ll certainly take your enthusiasm into account when it’s time for grading. Now, please remove all of your clothing and have a seat facing the rest of the class.”

Paul felt his heart skip a beat. It was one thing to be naked in front of trained professionals--and, apparently, trained sex educators--like Ms. Jones and Principal Hunter, but fellow students? Sensing his hesitation, Ms. Robinson responded firmly. “Paul, artists have been using the human form as their subject for thousands of years. There’s absolutely nothing to be ashamed of. Now, do you want those extra credit points or not?”

Reminding himself that even his parents liked classical art, Paul reluctantly disrobed and settled himself in front of his female classmates. He was so distracted by his own embarrassment that he almost missed the girls’ reactions to his flaccid penis.

Eliza gasped audibly and fixed her brown eyes on his crotch. Her pink tongue kept darting out of her mouth to moisten her lips as she stared. Toni’s reaction was more subtle, but beneath her desk he could see her pressing her legs tightly together, her jean skirt revealing just enough of her chocolate thighs to show him that her muscles had tensed up. Amy, if it were possible, seemed to be looking at him with an even angrier expression than before as a red flush crept over her cheeks.

Even Ms. Robinson was staring at his exposed cock, and Paul heard her mutter something he didn’t understand but that sounded like “Maybe Vicky wasn’t dreaming after all.” The teacher quickly recovered herself, however, and sternly called out “Amy, Eliza, Toni!”

The girls reluctantly looked away from Paul toward their teacher. “Girls, I can only ask Paul to do this as long as it’s for a legitimate artistic purpose, do you understand? That means that if you’re not sketching, I’m going to ask him to put his clothes back on and we’ll work on something else.”

To Paul, this seemed like a strange thing to say. Why wouldn’t the girls be busy sketching? They were the best three artists in the whole school. But the girls just nodded to show they understood, picked up their pencils, and started drawing him.

At first, Paul let his mind wander because it was just too strange to sit and think about sitting naked in front of three pretty classmates and his art teacher. He was also careful not to think about his meetings earlier in the day, because he somehow knew that even though they had been for proper school business, they were going to lead him to inappropriate thoughts.