Parasite (Concise Oxford Dictionary Tenth Edition)
- An organism which lives in or on another organism and benefits by deriving nutrients at the other’s expense.
- derogatory A person who habitually relies on or exploits others and gives nothing in return.
Self-centered (Concise Oxford Dictionary Tenth Edition)
- Preoccupied with oneself and one’s affairs.
I think I should be one, too … but who’s gonna be the host if everybody is parasite?