Cloaca

Synonyms:
See also:	Alien Kink, Anthropomorfic, Bestiality
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A Cloaca is a multi-purpose orifice designed for waste disposal, mating, and birthing/egg-laying, and is present in creatures such as birds, reptiles, and amphibians, as well as being a feature in many fictional alien and fantasy species.

While most anthropomorfic characters in fanworks default to having a traditional penis, some creators opt for a cloaca, particularly in regards to species which would have one in real life. The inclusion of a cloaca is often associated with kink, and is especially popular with monsterfuckers and other xenophiles.

Resources

• Cloaca tag on the AO3.