Spank his ass, of course!

"P-punished?" John asked, still somewhat hazy from his post-orgasmic bliss. "But I didn't...I can't..." Before he could voice his objections, he felt his body going on auto pilot again, shocking his mind back into instant clarity. He whipped his head around to Amethyst, his heart pounding as he saw her quickly writing some new instructions for him in the notebook. Oh God, what fresh humiliation was this?

"Oh yes, Sara, I NEED to be punished!" It was his voice, but the words were completely out of his control. He turned around in his chair, resting on his knees and thrusting his ass outward. "Please spank my naughty bare butt! Slap my cheeks and make 'em red! I want everyone who sees me butt naked today to know I'm a bad boy who deserves to be punished!"

He involuntarily wiggled his hips, making his rear end a more enticing target. To his surprise, though, Sara didn't immediately leap into the spanking. Instead she began caressing his butt like a lover, gently squeezing it with both hands, lightly trailing her fingers down the cleft of his cheeks. He shivered with delight, feeling himself slowly twitching his way back to half mast. He used to dream of feeling her soft hands on his body, but the reality was so much better. And this intimate, private touch was happening in full view of a whole classroom full of people. He had never felt so naked in his life. His gaze wandered around the room, making eye contact with everyone staring at the unbelievable scene unfolding before them. Almost all of them had their phones out now. Were they posting these pics online? Was anyone recording video? He felt his face blaze at the thought. Even if Amethyst had promised to undo all of this, how many people would see this perverse spectacle before the day was done? While he was still pondering this, he felt the first stinging THWACK of Sara's hand on his right butt cheek. He involuntarily moaned, arching his back to better present her with her target. He had no chance to recover before the next swat landed on his left flank. Right, left, right, left, he quickly lost count as his former crush assailed his ass without mercy. By the time she had finished with him, all four of his cheeks were equally red, and his cock was fully hard again.

"Have you learned your lesson now, naughty naked boy?" Sara asked, leaning over him. He expected to feel her hands on his ass again, but much to his shock, instead she began to caress the rest of his body. She freely explored his chest, his belly, his legs, and even the full length of his twitching, slightly dripping cock. He tried to focus enough to answer her himself, but once again, found someone else's words on his tongue.

"N-no, ma'am!! I don't deserve to get off so lightly! I deserve to be spanked by EVERYONE in this room!" His eyes widened. "It's not enough for people to see me, I want everyone here to touch my entire naked body!" Oh my God, Amethyst WOULDN'T, would she? There were at least thirty people in this class! Surely she didn't expect him to let all of them spank and fondle his naked ass? Even the guys?! He looked at her, quietly panicking at the idea. She simply smiled serenely.

"You can forfeit now if you're losing your nerve..." she grinned, nibbling the tip of her pen playfully. Nobody else in the room seemed to be able to hear her. "You can still say 'I give up' freely! Otherwise all you're gonna be able to do is keep babbling a bunch of horny nonsense and letting everyone touch you wherever they want until the bell rings." He gulped. She was completely serious. What could he do? This was only the beginning of what she had in store for him, and she'd already implied he had at least one more group spanking session to make it through. Could he take the humiliation? And could his poor, besieged bare bottom endure more punishment?