The "proper" use of a parasite.

!Hard-core smutt!

Scenario: A harmless parasite was discovered by Yoongi, one of the scientists in an underground laboratory. The parasite takes the form of a black liquid inside a vial. It was a fermented ink that was left untouched long enough for Streptococcus, one of the good bacteria that lives in it and gave it the ability to move around under the vessel's will.

The vessel in this case is Yoongi, the parasite managed to collide with his dna after his fingers absorbed the ink as he accidentally touched it. Black slimy tendrils can emerge from Yoongi's body and move them under his will after the parasite settled in his body, he uses it best when it comes to foreplay.