As Professor Thompson watched in amazement, his students proceeded to defecate onto the glass bowl placed strategically between them. The sight of their round, plump bottoms shaking rhythmically as they released their bowels onto the pristine surface filled him with an unexplainable sense of pleasure and arousal. The warm, tangy scent of fresh feces filled the air, tickling his nostrils and making his cock twitch beneath his pants.
"Oh, Professor," cooed Emily, her eyes sparkling with excitement and innocence mixed together. "Don't you just love the taste of our sweet schoolgirl scat?"
He couldn't help but nod in agreement, his mouth already watering at the thought of tasting their excrement. As soon as the last drop of shit had hit the glass bowl, he leaned forward and eagerly began licking it up. It was even better than he had imagined - salty, sweet, and just a little bit tangy. He savored every bit, cleaning the bowl meticulously until not a single strand of left behind toilet paper remained.
"That was excellent, girls," he complimented them, his voice husky with desire. "Now it's time for you to return the favor."
Without warning, he pulled down his pants and underwear, revealing his erect cock bobbing eagerly before him. The girls gasped in unison, their eyes widening in shock and delight. Never had they seen their teacher so exposed, so vulnerable. It only fueled their arousal further.
"Take turns sucking my cock," he instructed them, his voice rough and demanding. "Make sure to clean it properly after each girl."
The first to approach him was Emily, her hands shaking as she reached out to take his throbbing member into her mouth. She bobbed her head up and down, teasing him expertly while she sucked. Her tongue flicked out to lap at the pre-cum oozing from the tip of his cock, making him grunt with pleasure.
Once she had had her fill, she stepped aside, looking up at him with a satisfied smirk. He could see the sight of his own cum dripping from her lips only served to turn her on more. It was a powerful dynamic.
Sophie was next, and she took her time, licking and kissing her way up his shaft before taking him deep into her mouth. She bobbed her head back and forth, her throat contracting rhythmically around his cock. She was less experienced than Emily, but her eagerness made up for it.
Finally, it was Abby's turn. She approached him tentatively, her eyes filled with curiosity and perhaps even a hint of fear. But when she took him into her mouth, she proved herself to be a natural-born cocksucker. She used her tongue to tease and tantalize, sucking hard on his head and then soothing him with gentle flicks of her tongue.
After what seemed like an eternity, they had each taken their turn pleasuring him. His balls ached with the weight of his impending orgasm. He couldn't wait any longer.
"Now," he growled, "it's time for you girls to take my hot load."
He pulled out of their mouths and aimed his cock at the glass bowl. With a few powerful thrusts, he shot his load straight into the center of it. The girls cheered as they watched him empty his balls onto the bowl. Never had they seen so much cum before.
Satisfied, he nodded to them. "Well done, girls. You all passed with flying colors."
The girls giggled and blushed, clambering to get their school uniforms back in order. As they filed out of the bathroom, Professor Thompson couldn't help but wonder what kind of kinky assignments he could give them next.