From opera (Mozart's The Marriage of Figaro) to Hollywood (Braveheart), the notion of jus primae noctis has been a great dramatic device, because it inspire's the deepest sense of outrage at injustice in the viewer, and the dramatic energy is enough to propel the plot forward. It is part of the larger pattern of many great dramas to posit a horrific injustice, which energizes the forward action of the storyline as the protagonists attempt to restore justice.
For those who don't know, jus primae noctis is a legal term for the right of the local nobility (usually a count, or a duke, or a baron; originally a feudal lord in earlier times) to be the first man to sleep with any girl on the night of her wedding before she is allowed to sleep with her husband.
Despite the depth of the outrage which this phrase invokes, and despite the high profile which it has attained in literature and other art forms, one question remains: did this ever actually happen in real life?
According to most historians, the answer is no. Although history knows many examples of aristocrats who used their influence to seduce, or rape, girls in their territories, there seem to be no recorded examples of a royal who attempted to codify this as law, or who attempted to systematically carry out this idea. It seems to be a powerful, but ficticious, literary invention. Sociologists have noted that, if anybody had ever actually tried to institute this as a legal practice, he probably would have been quickly assassinated.