It's worth noting that you have to be careful not to absorb all the negative psychic crap people tend to give off. I've made the mistake a couple of times of just opening myself to all the energy in an area crowded with people who are likely as not under stress, and have suffered results from nausea, headaches and disorientation, to extreme emotional states such as panic or loneliness. Some people get around this by only feeding when the victim is in a suitable emotional state, only feeding from specific types of people, only feeding from one person at a time in a secluded place, by setting up servitors or shields to filter out undesirable energy, or by doing this manually. I've found that extreme negative reactions only become uncontrollable if the vampire is exhausted, emotionally or physically.
psychic vampirism
Psychic Vampires (aka. Psi Vamires, Psy Vampires, Energy Vampires, etc. Here we'll call them psis for ease) are people who draw in pranic energy (aka. Life Energy, Life Force, Chi, etc.) by seemingly psychic means. This energy comes to them through their environment and those who are within it. This means people, animals, plants, and ley lines* as well as various parts of nature. Some psis will report that the energy of the desert, the ocean, and the forest is notably different. This may be because of the forms of life in each or something else which I do not have the name of. Before a psi gains control of their feeding* they sometimes will report that their friends and family find them "exhausting" to be around but might not have a "reasonable" explanation for this. This is because psis will sometimes feed instinctively and uncontrollably if their bodies are lacking in the energy they need. This isn't the same as a "pick me up" or a cup of coffee. Pranic Energy is actually seen by the body as a source of nutrition. Psis who don't feed regularly will sometimes be obese. This is because they are instinctively taking the energy they need from physical food. Although meats and veggies have some pranic energy left in them, it's not really enough. To get a decent source one has to eat a lot! They also report feeling tired a lot. Their bodies are trying to naturally produce the amounts of pranic energy needed and that means sleep. Feeding A psi who has control over their feedings is usually happy, healthy, and has good relations with friends and family (now that he/she is no longer drawing their energy!). Psychic vampires are inherently good at energy manipulation. And it is this manipulation of energy that allows them control over their feedings. Another thing that helps is their ability to somehow sense (often referred to as "tasting" another's energy. If it is positive, negative, neutral, will mix well with their own, even if the person has a lot or a little. It's described as being almost a physical taste but somehow different. Mere words cannot describe it well. But how do they feed? For someone who can see energy fields, spirits, and auras, it would almost appear as if tentacles (an almost indigo color) come from the psi's hands, stomach, or third eye* area. Someone who is sensitive to the feel of auras reported a psychic vampire as having "an almost sunking feeling to it {the aura}. Almost reminiscent to a sink hole." Psis often will visualize those same tentacles when they draw energy directly from something. However, energy isn't always drawn directly from a person, plant, etc. As a matter of fact, most psis will draw energy that has already been given off from another. This is great when in a movie theater because everyone is throwing their energy out as they watch. Clubs are also another great source for this as is sex. When emotions are stirred in a person they also will throw their energy out. For this, many psis will stir emotions in others so that this energy is thrown at them. It makes it easier to draw. Many psis will have an unusually high amount of charisma (their pheromones are unusually high) when they need to feed or are "hungry"*. This is a biological and natural response that their bodies are making because of their need to feed. Also, when a psi is hungry they will sometimes dress outlandish or do outlandish things for the extra energy.
notes on absorption
Performing the following is easier if you are actually biting or drinking the blood of your victim or donor although it is possible when not in contact with that individual. This has also been successfully performed by one person injecting the blood of another** (the blood was visualised as containing glowing red energy). Concentrate on absorbing energy from your victim. Visualize this energy pouring into you from the person as an electric stream. There is often a special rush if energy is taken by force or when the victim is in a strong emotional state, fear and lust being notable. From all reports and my own experiences of drinking blood, two people who are close will both gain from exchanging blood or energy. I find that if such an exchange of energy is going on between two people it is preferable that they are both in a sexual frenzy. In the case of two people exchanging energy, the two people will both gain from exchanging this energy. It seems that exchanging energy generally results in both parties feeling stronger, magickally, physically, and emotionally. However the feeding is performed, you should feel greatly invigorated physically and psychologically. Feeding can cause an amphetamine like rush.
[We are] "Explorers in the further regions of experience. Demons to some. Angels to others." Cenobite, Hellraiser (1987)