The vampire is prone to be fascinated with an engrossing vehemence, resembling the passion of love, by particular persons. In pursuit of these it will exercise inexhaustible patience and stratagem, for access to a particular object may be obstructed in a hundred ways. It will never desist until it has satiated its passion, and drained the very life of its coveted victim. But it will, in these cases, husband and protract its murderous enjoyment with the refinement of an epicure, and heighten it by the gradual approaches of an artful courtship. In these cases it seems to yearn for something like sympathy and consent.

— Carmilla by Carmen Maria Machado, Joseph Sheridan Lefanu