Anal Slime

Anal Slime is a soccer ball-sized and shaped creature which consists entirely of thick, viscous slime. The Slime has red-to-purple color and is semi-transparent. The Slime is not self-aware and its intelligence is close to an animal. It can't talk and will not try to communicate with the host. The Slime can travel through bodies of water without dissolving, which allows it to infiltrate the sewer systems of modern cities. The Slime feeds on anything it can find - rotten plants, dead organics, various garbage, but it prefers feces. It's capable of ambushing animals and humans during the defecation process and invading their bodies to have an access to nearly infinite waste supply. It dwells in the host's intestines like a parasite after invading them. After entering the host's body, Slime occupies the large intestine, inflating their belly noticeably. Due to swelling and stretching, host feels a strong, constant urge to defecate. The host may try to expel the slime, but due to its consistency it's nigh impossible. The slime won't leave the host's body on its own. Slime's presence prevents the host from farting or defecating, as their waste and gas are consumed by slime. The slime won't try to hurt its host or take control over their body. The slime squirms sometimes, massaging the host's intestines from inside. After consuming enough waste and growing big enough, the slime will start reproducing. The newborn slimes will try to leave the host's body through their anus. The host's urge to defecate will grow stronger, forcing them to push the newborn creatures out. Excreting slimes on regular basis stretches host's anus wide and may even cause it to prolapse. The first, initial slime won't try to leave the host's body. The infestation process must be detailed, with focus on the host's sensations.