Anne Rice said this quote

Killing is no ordinary act,' said the vampire. 'One doesn't simply glut oneself on blood.' He shook his head. 'It is the experience of another's life for certain, and often the experience of the loss of that life through the blood, slowly. It is again and again the experience when I sucked the blood from Lestat's wrist and felt his heart pound with my heart. It is again and again a celebration of that experience; because for vampires that is the ultimate experience.