I told it her not to worry and stepped into the cubicle with her, seeing a mound of fresh shit in the toilet. I blushed a bit because her dress and shit-stained panties were still around her ankles but kept a straight face and saw her lock the cubicle door behind me. I began to grab some toilet paper and was about to pull it off the roll when I heard her, "No! Not like that.." And she grabbed my arm and pushed me into the corner of the cubicle, back against the door facing her. I was now sitting on the floor and looking up at her when she turned around and poked her cute butt out at me, as if inviting me in. She quickly backed up her warm rear end onto my face, completely nude and ripe with the smell of dung. I panicked for a second, but took my first breath and was immediately in a sort of trance. The sour, literal shitty smell from her bright pink asshole was amazing, and she began to grind her rosebud up and down on my nose, still wet with shit and piss. I pulled my arms around her thighs and brought her closer to me, burrowing my nose further into her crack, as my cock grew erect. I heard her moan quietly when my nose entered her anus, and began lapping my tongue around her clit and cute butthole to clean them. I heard her moan some more, then suddenly she stopped. I payed no attention, but she suddenly tried to pull away from me, but I was too addicted to the smell of rotten eggs that come from her asshole and held her on top of me. Out of nowhere, her bunghole flexed open and out came a massive, loud fart that shot straight up my nose. My eyes began to water up and my lungs were burning but I powered through the smell, quickly adjusting to it and continued sniffing and licking at her ass. She soon realised that I didn't care what she did in the moment, and that I was captivated by my sexual lust and the smell of her cute asshole. I continued sniffing the stale are directly out of her intestines, my nose still shoved far up her rear, and she bent down to release another huge fart that I eagerly inhaled. She continued bending down however, and reached her arms for my short that she threw off and then gazed at my cock. Being a big fan of gymnastics, she was easily able to bend her body over and wrap her warm lips over my member, and began sucking to her hearts content. Because I was inexperienced, I released my load into her mouth after only a minute or two, but instantly got hard again due to the smell of her behind. Suddenly, she stopped and moved my arms away and stood up. She bent over and crouched over the floor infront of my dick and began grunting. I sat, wide-eyed as I saw a series of massive logs pile out of her asshole and onto the floor. The smell was absolutely amazing, like none other that I had ever experienced, and she picked up the turds and dropped them on my dick. She resumed the position she was previously in, and I began to sniff at her once again freshly scented asshole and lick her clean. She bent over and started to suck my cock again, with her own pieces of shit moving around over my dick and inside her mouth. We continued our naughty play for the next half our before stopping from exhaustion, and she hurriedly left the bathroom and ran off into the hallways. I sat, dazed for a few moments before standing up and walking back to our classroom. When I arrived, Tiffany wasn't there and everyone was staring at me. "..Michael.. why do you have shit on your nose?" Ms Blake asked me, intimidatingly. I froze with fear and embarrasment, and dived for my bag before running out of the classroom and back home. END.