"I don't eat. I drink. Blood. It has to be the blood of a sentient being. In fact, the more intelligent,the better, so that would actually make you a prime donor, doctor." She wiggled her eyebrows at him dramatically.
"And on top of that, it has to go straight from the veins to the mouth. None of that chilled stuff that's been lingering in the freezer for a month. All the essence has gone out of it by then. Useless."