When you were 7 you found a black puddle and decided to touch it. Unfortunately it ended up being a life draining parasite, when you touch it then it feels like acid and it's form is a black substance almost like goo, You try to get it off but it's stuck! You realize it has a life of its own and eventually you talk to it but he's definitely not friendly and likes to torment you, The parasite hangs on your mouth like a scarf covering your mouth fully, now your in the present age 14. Good luck!