A psychic vampire is a person that feeds from the energy of the others surrounding him. This prey can either be an involuntary victim or so called "donners" who give energy willingly.
The talent for psychic vampirism is usually inborn and most act intuitively. Those with this inborn talent come in two groups, whose only difference is whether they know about their nature or not:
Reasons to Feed
There are many theories why there are psychic vampire. One of those states that the person afflicted by vampirism must feed on others due to a spiritual ailment that has reduced their vitality to the point where he is unable to charge it up himself.
Another theory is that the vampire is incapable of generating enough life-force himself or that he loses more energy than he can produce due to a weakness in the energetic field.
Also it is assumed that the vampire cannot use the energy he generates efficiently enough, spending more for trivial tasks and cannot replenish it by other means.
Others believe that their connection to the universal energy is somehow damaged or completely removed and they can't draw on it like other people do.
Everyone is constantly exchanging energy with the environment, drawing from and giving to the surroundings, thereby connecting all living beings. By using an aetherics system such as Tai Chi, Huna, Chi Gong or Rune Stödhur the practitioner becomes aware of this exchange and raise energy or use it according to his will. Ordinary people have to learn this skill while it comes natural to psychic vampires to sense and manipulate energy. As these energy raising practices often are not enough for the psychic vampire to fill his need, they feed on others.
Psychic vampires are capable of drawing on many sources to sate their hunger. Mostly they focus on human life-force as it appears to be easy for them to digest.
These vampires may feed on certain emotions - while they are usually allergic to the one directly opposing their primary source, others may go for sexually generated energy and a minority might even go for the blood which however is not an entirely safe way to go as blood diseases are quite common.
While it is generally assumed that ordinary people cannot become psychic vampires themselves it doesn't mean that those not born with this affliction cannot learn their talents of drawing energy from other beings.
The first step to take is to familiarise oneself with an energy system such as the above mentioned Tai Chi, Chi Gung or Huna. Get a feel for it, learn how to steer it.
Given time and practice anyone can draw on the life-energy and emotional energy of others.