As the hour hand on the classroom clock inched closer and closer to midday, Lily started fidgeting in her seat. The math lesson was dragging on endlessly, and she couldn't seem to focus on the numbers and equations scribbled on the chalkboard. Her mind kept wandering, drifting off to far more pleasurable thoughts. Her teacher's monotonous voice became barely audible, and soon enough, it was drowned out by the desperate need to release her overflowing bowels.
Without a second thought, Lily raised her hand and asked for permission to use the restroom. The teacher, happy that at least someone was paying attention during his dull lecture, nodded approvingly and granted her permission. Leaving behind the stuffy classroom filled with disinterested students, Lily made her way down the hallway, her barely contained excitement growing with every step.
Her favorite place to take adump was just around the corner - a filthy public toilet stall with a hole in the floor, stained and reeking. It was usually empty at this time of day, and she knew exactly what was waiting for her below. Lily kicked open the door and locked it behind her, savoring the moment of solitude. She wasted no time in dropping her panties and hovering above the hole. It was not long before she felt the familiar burning sensation in her rectum as her giant turd began to push its way out.
She let out a loud groan as her heavy load slipped from her anus and splattered onto the cold floor, filling the room with the stench of urine and feces. The ecstasy of knowing she was about to fulfill her darkest desires was often enough to make Lily cum just by herself. But today was different - she craved something more. Her mind wandered back to the human toilet who had been waiting for her all this time.
With a sickening smile forming on her lips, Lily went down on her knees and leaned over the gaping hole, her breasts pressing against the icy surface of the bowl. She allowed herself to slide to the edge of the toilet seat and then further still, forcing her puckered asshole right over the mouth of the toilet bowl. The cool air from the vent blew against her sore hole as she lowered herself slowly, inch by inch, until the tip of his tongue touched her anus.
"Ah-ha-ha!" She giggled, her cheeks flushing with excitement. "Now that's what I call fun!"
The human toilet, on cue, wriggled his tongue inside her tight opening, lapping up the salty taste of her juices and priming himself for what was to come. Slowly, Lily started to lower herself further, feeling her bowels relax as they emptied into the waiting mouth below. His eager lips parted as her steaming pile of shit descended towards him, and she couldn't help but watch with glee as he tried his best to swallow every drop.
His tongue squished and twisted inside her insides, slurping up all the remnants of her meals from earlier. It was a unique feeling that only a select few shared in experiencing - the power to make a grown man eat her shit. She watched as he squirmed and writhed beneath her, his face turning red and his eyes watering from the acidity of her diarrhea.
"You... like it, don't you?" She teased, enjoying the struggle she saw reflected in his eyes. "You like my taste..."
She didn't wait for a response before pushing deeper, feeling her bowels hollow out as her next, far bigger turd plunged into his waiting mouth. He choked and gagged at first, but quickly adapted to the size of her enormous turds. It took several minutes before she finally pulled away, feeling drained and satisfied. Her thighs trembled with exertion as she stood up, absentmindedly wiping the excess feces from her crack.
She took one last look at her mess before flushing it away, watching with delight as the water swirled around the clumps of shit and disappeared down the drain. Smiling, Lily slipped out of the stall and made her way back to class, her thoughts already drifting to the next time she would get the chance to feed her forbidden addiction.