OKAY BUT YOU ASKED uuhh cw for ovi and very detailed parasitism I guess?
the thing i noticed about 99.9% of ovi content is that it puts the person getting fucked in situation that's anywhere from passive recipient to flat-out victim. which, if thats your preference, kudos to you, but personally i need something that will let me be a bit more predatory, you know?
so obviously the solution is to do convoluted biological worldbuilding!!
COMPONENT ONE: The Parasite
An immobile creature that lives embedded in the ground, disguised amongst the local plantlife. While lying in wait, it's nearly invisible, with only a stretch of small, waving fronds above the surface. Beneath the ground is the main body, a coral-like structure that houses the organs that make up its nervous and reproductive system.
The appearence of the fronds depends on where the parasite has established itself. It can look like soft curling moss, waving waterweed, leaflitter, or similar. These fronds are incredibly sensitive to vibration and chemical signatures on the air.
As a means of attracting a host, most species of this parasite will release into the air a chemical with a strong similarity to that produced by bacteria that breed in the dirt near sources of water. Those species that already live near to those sources appear never to evolve this mechanism.
COMPONENT TWO: The Host
A six-legged, lightly furred, nomadic mammal with a low-slung body. It is loosely gregarious and nomadic, following migratory paths back and forth several times across the year, grazing an area until it is depleated and the herd moves on to the next. The animals have incredibly fine-tuned senses of smell that allow them to track down water.
There is very little in the way of sexual distinction between species, with all individuals able to produce sperm and eggs, as well as carry young. Genetic diversity is maintained primarily by way of social means, with dynamics within the herd dictating which individuals are 'allowed' to breed with others.
MECHANISM ONE: The Parasite Preys On The Host
The host will be drawn to the scent produced by the stationary parasite, and investigate the fronds for the source. The fronds, regardless of their appearence, are covered in fine hairs, much like those of a stinging nettle, which on contact inject the host with a medium strength muscle relaxant.
When the host's movements become sluggish, multiple appendages will emerge from the main body of the parasite- a combination of multiple 'arms' specialised to restrain, and between two to five ovipositors, though depending on the age, size, and species of parasite, the exact number can range from just the one to as many as ten. These appendages are highly dextrous, but thin-skinned and slippery.
The parasite will restrain the host, and the ovipositors will locate the reproductive canal from the chemical information relayed by the fronds, and deposit their eggs. The eggs are spherical, with a clear mucal coating over a tough but pliable membrane. A chemical reaction within the egg causes them to glow a soft blue that is visible as they pass through the ovipositor.
The parasite will deposit a limited number of eggs over fifteen to twenty minutes, after which it will release the host, and retract back into its main body. The host will recover from the relaxent enough to return to the migratory path. Over the course of several days, the eggs will take root in the host's reproductive system, similar to an actual egg of the host species, and draw in the nutrients that would ordinarily be provided to maturing young. Some species will hatch from the eggs into a mobile, proto-frond form, penetrating the body further and absorbing nutrition directly from the blood.
The host will eventually die of malnutrition some distance from the original parasite, where the decaying individual will provide sufficient nutrients and minerals for the eggs or proto-fronds to develop into a mature parasite, establish itself in the ground, and start the cycle over.
COMPONENT THREE: The Predator
A solitary, mustelid-like species with some feline features. It is an omnivorous opportunist, though it prefers to scavenge or forage over directly hunting, since it is physically inferior to many other obligate carnivore species. It is possessed of a much greater, more adaptable intelligence than the host, though it is roughly the same size, weight, and carries a very similar chemical signature. It will follow similar paths to the host species, though it has been observed to divert and redirect apparently on whim.
Unlike the host species, the predator species exhibits clearer sexual distinction. All individuals, however, produce a blue glow in the lining of the throat, which has been observed to play a role in courtship rituals.
MECHANISM TWO: The Predator Preys On The Parasite
The predator species will actively seek out the parasite, using a combination of a highly developed sense of smell and a high degree of observational intelligence to distinguish between parasite and the envionment it mimics. It will approach and deliberately lay in the parasite's fronds. The muscle relaxent has only a moderate effect on the predator, producing a pleasant warming sensation. Younger, inexperienced predators will sometimes become distracted and simply lay still. In this case, the lack of movement will fail to trigger the emergence of the 'arms' and ovipositor. However, most usually the predator will leisurely roll and stretch, mimicing the motion of the affected host species.
The mucal mebranes of both the predator's reproductive canal and mouth produce a chemical that is very similar to that produced by the host species. However, these menbranes also produce a toxin that, when absorbed through the membrane of the ovipositor, will disrupt the signals of its nervous system. Instead of depositing a limited number of eggs and then withdrawing, the parasite will spasm and disgorge all the eggs it contains, then to be swallowed by the predator. It is hypothesised that the interior glow of the predator comes from this aspect of its diet. Successful predators have sometimes been observed gnawing on and swallowing the 'arms' of the parasite before departing.
Those eggs released into the predators reproductive canal will be allowed to attach to the uterine wall, but instead of drawing nutrients from its host, the egg will be forced to release its contents, slowly dissolving into the predator's bloodstream over the course of eight to twelve days. This caused much confusion amongst researchers before this species was observed predating on the parasite, since those visibly 'pregnant' individuals were included in predictions regarding population growth.
It is not impossible for the parasite to survive the overall process, but some species are more resiliant than others. The parasite's method of reproduction is fairly energy intensive, and a 'theft' of this kind will often leave it without the resources to fully recover. In contrast, is has been hypothesised that the nutritional density of this part of the predators diet is what allowed it to develop to the level of intelligence it has apparently reached. Research into a possible communication with the species is ongoing.