terror is a real and powerful thing. A monster is ever-so-slightly scarier if it violates you in some way. there have been many of these types of creatures seen in myths and fairy tales. This goes beyond the cliche succubus concept, and includes monsters such as the liderc and the pobobawa. Many of these monsters are far more terrifying in origin myths, and a call to remain steadfast in society's values and traditions. Whether it's warning against sex with loose men or women, or cautioning against the spread of diseases, there is often a morality tale behind them.
These kind of creatures are sometimes used today with various results. Manga like Berserk or warhammer go out of their way to show the gritty details and get very visual. Since sexual assault is a serious and sensitive issue in today's world, how should these creatures be portrayed? Should they be used to add shock value or add to the grimdarkiness of a world? Should they be portrayed differently ?