JANE: Some people think that external beauty comes from inner tranquility. Of course, some people think it comes from drinking the blood of virgins, so there’s quite a range there.

Steven Moffat (b. 1961) Scottish television writer, producer
Coupling, 03×01 “Split” (2002-09-23)
    (Source)

(Source (Video), at 18:23; dialog verified.) See the tale of Elizabeth Báthory.