Reproduction

the sex and reproduction of the main species

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Almost all creatures in Orrison are intersex, though the presence or absence of certain parts vary from individual to individual.

Egg gametes exist in the Ovum (1), passing through the magnum and isthmus to form the contents of the egg. The egg needs to be fertilized before it reaches the Shell gland (2), otherwise it is reabsorbed instead of forming its shell. The earlier sperm reaches the egg gamete, the likelier fertilization is to occur.

The phallus is normally retracted in the body. The phallus can be extended on will with the flex of attached muscles (4) but requires external stimulation to become rigid for insertion into another. It grows slightly in size, and once readied doesn't need to be flexed to remain out. Extension does stress other connected parts at the end of the vagina-- the space just after the sphincter of the Shell Gland stretches long and thin, while the entrance of the tract leading to the bladder moves along with the vagina remaining close to the entrance. During arousal, the testicular organ (7) fills with semen, which is ejected on orgasm if the phallus is extended.

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Conversely, while retracted, the muscle of the walls are relaxed and pliable (versus when extended, like a finger trap). Insertion can also be performed in the space around the phallus (for example, below the vagina between the muscles) as when retracted there are pockets, but the comfort of this varies between individual. The sphincter at the end of the vagina (3) near the base of the Shell Gland is normally tightly closed, and only opens in two situations: 1) passing an Egg or 2) with copious amounts of internal stimulation during orgasm. Eggs are normally passed with the phallus retracted (where it retains pliability and the support of surrounding muscles), as doing otherwise can cause tears.

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With the same internal stimulation as causes the opening of the Shell Gland sphincter, the entrance to the bladder is closed. Ejaculate flushes backwards into the bladder with orgasm, remaining until the next evacuation or being reabsorbed.

Any combination of these organs can be present or missing in an individual, affecting their reproductive ability and preferences. It accounts for part of the high infertility rates among individuals.

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Parts are normally not visible when completely unaroused. The vent opens with stimulation, but it's up to the individual as to whether or not to extend their phallus.

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This is the range of 'traits' available. These can be mixed and matched, and there's not really any limitations-- the associated species names are just what tends to be typical for that species. Any species can also have any color, though normally it matches their other mucus membrane colors

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Here are some more examples of potential variations with how traits can be combined.