Within the vampire community, blood-drinkers are commonly known as sanguines or sanguinarians. The word is taken from the Latin sanguis, which means literally, “blood.”
A sanguine vampire – “sang vamp” for short – drinks blood from willing human donors on a semi-regular basis. Amy Krieytaz has coined the term "sanguinarians" for blood vampires whose main vampiric tendency is a compulsion, or need, to consume blood for reasons that are not primarily related to eroticism or emotional satisfaction.
Blood cannot be digested by humans for energy, and is no different in these sangs, which pass the blood out in their dung, urine, and sweat gland excretions. Sanguinarians can contract AIDS, or any other communicable disease via the blood they ingest or manipulate.
Most desire human blood, and many blood vampires have arranged for "donors" to supply them with fresh blood. Some blood vampires describe a life-long fascination with blood and blood-drinking, while others experienced an abrupt awakening of blood-craving which they may or may not be able to trace to a certain event.
The amount of blood consumed, and the frequency of consumption, varies highly among blood vampires, but few consume more than tiny amounts at a time, usually obtained through slight cuts or punctures made by lancets or razor blades on willing human "donors". See Bloodletting
Often, the "donors" themselves undertake the making of all cuts or wounds. Many blood vampires insist that "donors" undergo testing for blood-borne diseases, including HIV and hepatitis. Some blood vampires consume animal blood, but this is unpopular and usually considered an inferior substitute for human blood.
Because of the obvious difficulties in finding trustworthy or consistent "donors", or other sources of fresh blood, many blood vampires are highly concerned with the problem of "blood famine" or blood deprivation. More material substitutes for blood that are reported include "blood" drained from raw meat, rare meat itself, milk and dairy products, and even chocolate.
Blood-drinking HLV's believe strongly that their need to consume human blood is not merely psychosomatic, but none of them has been able to present any workable theory as to just why they require blood.
Blood vampires are divided into two primary categories, by intensity of their need for regular blood consumption.
In this age of Hepatitis C and HIV, this is admittedly a risky practice, and while there are several resources online that offer tips for making blood-drinking as safe as possible (such as Sanguinarius.org), a lot of the safety procedures rely heavily upon each individual's personal habits.
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Types of vampires