Barnacles

Barnacles are a species of small parasitic creatures that resemble a tiny leeches, but colored reddish brown. The parasite's average body is a 6 millimeters long and 3 millieters wide (but the size varies slightly), it's flexible, wiggly, and slimy, like a tiny tentacle attached to the host's skin. Areas covered with parasite colonies look fascinating and disgusting at the same time, as the host's skin was covered with a thick layer of living, squirming alien flesh dripping with slimy mucus. Parasites are packed so tight that nothing can be seen through the living carpet of their squirming bodies. Barnacles are not self-aware, and can't think, speak or communicate. They're just reproducing mindlessly. Barnacles reproduce by smearing around mucus they produce, mixed with tiny eggs. Barnacles latch onto the outer layer of the skin without burrowing inside, and the best places for them are damp areas usually hidden from eyes - such as groin, labia, anus, armpits, nipples, mouth and tongue. Parasitic colonies growth is slow, but speeds up if the host is sweaty or aroused, since Barnacles need moisture to reproduce. Barnacles don't crawl or move in any other way. They cling to their birthplace and stay there, feeding on the host's bodily fluids. Wriggling parasites cause tickling sensations, causing the host to stroke and rub infested areas and thus spread their eggs further across their body. Barnacles can't burrow under the host's skin or manipulate their body in any way. Barnacles won't survive without air supply and thus can't live and reproduce deep inside the host's body. Barnacles' eggs are usually found in poor processed food and water, and thus the infestation usually begins from mouth or anus. The infestation process must be slow and detailed, with focus on the host's sensations.