Random thought I had: vampires were either once human or born vampire but they still have the anatomy as a human. a human can only eat or drink so much without falling ill or their stomachs explode right? well mythology says a vampire can drain a human of all the blood in their body. well the human body has about 1 1/2 gallons of blood in it. 6 liters of water will kill the average human if they drink it within 3 hours. a vampire will drain its victum within minutes. if they have the same anatomy as a human how could this be possible. if i am correct they would not be able to drain the victom completely of their blood without dying.