No, the idea of vampires didn't come up out of nowhere, but that doesn't make it any more real. It arose from medieval superstition and misunderstandings about death and the decaying process. Back then, vampires were corpses that were not given a proper burial, and in turn, they arose to get revenge on the living. Our modern depiction of vampires comes from Bram Stoker's Dracula whose vampire was then based on a Romanian ruler.
And while there are kids out there who might like to drink blood and play dark and mysterious, vampires are not real.
Agreed, the original stories of vampires: purple, bloated, blood around the mouth on corpses believed to be vampires coming back form the dead to feast on the living, all have scientific reasons behind them.
From then they escalated into Dracula, Edward Cullen and Damon Salvatore, the stories became more and more extravagant as time went on, but that doesn't mean that any of the history behind them is real. (bar Vlad the Impailer, the basis of Dracula, he was a real guy just not a vampires.)
Vampires are biological misunderstandings, not real.
Real vampires don't exist. The exact origin of the myth of vampires isn't known, but there are quite a few speculations as to where the myth first originated. Stories of vampires have been around for centuries. One common myth and misconception suggests that Vlad The Impaler, who was originally known as Vlad III, Prince of Wallachia, from the House of Draculeti, was a vampire. This following article should explain it better.
vampire will never exist it physically impossible, and further more people who state they are probably have medical needs and needing blood transfusions and some people are just delusional and mental
The stereotypical pale, sophisticated, charismatic, allergic to garlic, afraid of sunlight vampire was not the original version of what a vampire was. (You can thank John Polidori's The Vamypre and Bram Stoker's Dracula for that.) While there are many cultures such as the Mesopotamian s, Hebrews, Ancient Greeks, and Romans who had tales about demons and malevolent spirits who were thought to be precursors to our modern idea of vampires, the actual folkloric vampire comes almost exclusively from early 18th-century Southeastern Europe. It was at this time when oral traditions were then being recorded and published.
Even as the vampire superstition plagued this part of Europe and spread westward, the main concept of the vampire was a corpse (mostly men) who would come back from the grave to drink blood and have intercourse with his widow or the woman he cared for in his lifetime. There are some reports of these "vampires" begging for food from the living. If one refused, they would be found dead the next day. This is why we see evidence of graves being dug up, stakes driven through corpses, bodies being lain facing downward, and the decapitation of corpses because many times when the accused vampire was discovered in his grave, he appeared to be bloated and ruddy, as if he had just eaten. This can be easily explained as many villagers in those days were ignorant to the process of human decomposition.
It wasn't until the Empress Maria Theresa of Austria sent out her personal physician, Gerard van Swieten, to investigate these so-called "vampires". Despite it being the Age of Enlightenment, many still were extremely superstitions of vampires. It was he who concluded vampires did not exist, which then lead to the many laws prohibiting any more grave diggings and desecration of the dead. Thus ending the vampire epidemics, though the art and local superstition lived on.
This, of course, is specifically from Medieval and European folklore. There are many versions of vampire like monsters throughout the world like the Impundulu of Africa, the Loogaroo from the Americas, Cihuateteo of the Aztecs, Vetala of Southern Asia, and so forth.
Now when talking about modern vampirism, like the drinking of blood from donors or the psychic feeding of ambient energy of others, things get a little more, and I'm sorry to say, like fiction. The predatory archetype, sexual allure, and magickal qualities of the mythological vampire, mixed and influenced with neo-gothic aesthetics, makes a very useful tool in ritual and energy work in occultism. There's a reason these people feel the need to drink blood and/or feed off of others energy. It's a lust for power. I cannot put more emphasis on the word feel . Just because you feel the need to do something, does not make it an actual necessity.
Personally, I think modern vampirism falls into the otherkin category, where it's either a spiritual or psychological belief/condition. This isn't to invalidate anyone's identity as such, however, to claim that there is no other explanation for such feelings and ideas is just wrong and misleading to others.
You have a point, although those people who "crave" blood have a medical condition. That does not mean they are "vampires". You as well as others can believe what you want, but in this case, the medically challenged people who need blood are simply an example of science, illness. Nothing more. But there is what is known as psychic vampires, although they are not the vampires our society thinks of today. :)
I get what you mean about the spiritual/emotional vampires. But that can be better explained within psychological disorders and how someone can be sociopathic, or more importantly, narcissistic . Narcissism is where you basically do not care about anyone else so long as you are being put first into consideration, and I've met plenty of people who are like this, and I've even slight tendacy for it since it runs in my family to have this personality type, then again everyone's got a spectrum and degree to which the symptoms fall under. Some were so bad I literally said they were pathetic blood-sucking leeches that despite saying they had wanted to keep their family together, they actually displayed an abnormal amount of selfishness and it never occured to them what they did was conflicting with what they thought they were doing, and in turn ended up taking from everyone else and giving nothing back.
Though there are cultures that partake in eating of blood related foods, such as morcilla in spanish or latino cultures, and blood sausage in I think Iceland? And other places. There's also the rituals that call for those things(blood and uncooked related), and even raw meat to a certain extent.
The problem there is that most sanguinarians (or self proclaimed "real vampires" who actually drink blood from donors) almost all agree that their blood source must come from a living being. Bloodied steak is one thing but without it coming from a living source it's essentially what they call "dead energy." To them, it's completely useless.
Most ancient cultures have (and I believe some still do) practiced the drinking of blood and/or the eating of flesh from their enemies to gain their enemies power (The Mohawk Tribe for is a good example if this practice.) As I mentioned in my post above, it's all about power. Which I assume, as you said, comes from being a sociopath or narcissistic. They can claim it's a "necessity" and they absolutely have to have it in order to remain healthy, however, without sufficient medical proof, which they will admit that they don't have yet, they'll still be viewed as nothing more than goth kids with a closet fascination with Twilight.