http://dictionary.reference.com/browse/parasite
Nothing sacred, precious or beautiful about something that steals food and dies when it doesn't get it.
Parasite:
1. an organism that lives on or in an organism of another species, known as the host, from the body of which it obtains nutriment.
2. a person who receives support, advantage, or the like, from another or others without giving any useful or proper return, as one who lives on the hospitality of others.
Nothing sacred, precious or beautiful about something that steals food and dies when it doesn't get it.