There are two very diffirent types of vampires: Blood vampires and Psi vampires. Needless to say, the Blood vampires are the blood-sucking ones.
Most commonly known as a blood-sucking spirit, usually animating a cadaver. The earliest known representation of a Vampire is found on a prehistoric bowl and establishes the link, often present, between Vampire and Succubus. On the bowl, the Vampire, headless, is copulating with a human male. (Summers suggests that the Vampire is headless-Vampires are destroyed by beheading-as a threat to her of what would happen if she engaged in the sexual act depicted. Probably the man drank from the bowl and so protected himself from a visit by the succubus.) There is some question as to whether Vampire or Succubus is the older conception, and as to whether the two functions were originally combined in a single entity.
With regard to the succubus function of the Vampire, Summers quotes the Malleus: "Is it Catholic to affirm that the functions of Incubi and Succubi belong indifferently to all unclean spirits? . It seems that it is so; for to affirm the opposite would be to maintain that there is some good order among them."
Summers himself comments: "Now the Vampire is certainly an unclean spirit, whether it be that the body is animated by some demon, or whether it be the man himself who is permitted to enter his corpse and energize it, and accordingly it is Catholic to believe that a Vampire can copulate with human beings. Nor are there lacking instances of this."
Certainly there are not lacking instances. Vampires are to be found in the traditions of almost all of the peoples of the world, many function also as succubi, and sometimes as incubi. The better known Vampires include the AKAKHARU (Assyrian), BRUCOLACAS (Greek), DEARG-DULS (ancient Irish), EKIMMU (As-syrian), KATAKHANES (Ceylonese), MURONY (Wallachian), PONTIANAKS (Javanese), RALARATRI (Hindu), STRIGON (Indian), SWAMX (Burmese), TII (Polynesian), UPIOR or WAMPIOR (Polish), UPEER (Ukrainian), VRYKOLAKA or VURKULAKA or WUKODALAK (Russia, Morlacehia, Montenegro, Bohemia, Serbia, and Albania), VAMPYR (Dutch), WAMPIRA (Servian), PENANGGLAN (Malayan), and PANANGGLAN (Indian). The Penangglan and Panaugglan seem to differ in that the former, contrary to most conceptions of the Vampfre, is a living witch. Deserving of special mention is the MORA, a Slavic Vampire, who falls hopelessly in love with any man whose blood she has tasted.
A vampire is a person who does not produce a sufficient amount of pranic or "life" energy, and therefore has a need to consume energy from other sources in order to maintain a state of good health. This may be done by drinking blood (which is a high source of pranic energy), or by draining the energy from another life force. There are two main types of vampires: blood vampires and psi vampires.