FalloutStar

mutate worm - futa parasite

Added 2025-11-23 05:08:11 +0000 UTC

Among all living creatures, this worm is by far the weakest. It is slow, and its attack power is laughably feeble. Yet, despite that, it boasts the largest population of any species. Why? Because its genetic information is the simplest of all, allowing it to reproduce extremely quickly and giving it exceptional adaptability. Thanks to its simple genome, mutations in response to external stimuli occur with remarkable ease.

The original worms preserved their species by rapidly injecting semen into a host’s uterus, but these worms have evolved further. They now parasitize the host’s reproductive tract, transforming into a form equipped with a long insertion tube and numerous small pouches. When the host receives semen from another organism, the mutated worm channels that semen through its insertion tube into its own small pouches—just like a farmer diverting water to irrigate his fields. Once these pouches are swollen full of semen, they can slip out of the cramped uterus and become exposed outside the reproductive tract.

Moreover, this enlarged parasitic insertion tube not only stimulates the host’s clitoris whenever semen enters (greatly intensifying pleasure), it also serves as a birth canal through which the newly grown mutant offspring can emerge into the world.

Once established in a host, this mutant has far more opportunities to spread its kind than the original worm ever did, and its survival rate is known to be dramatically higher than that of the ancestral species.

Jessica Hayden. Thank you for your wonderful idea and commission!