For a variety of reasons, villainy and sexuality tend to be intertwined in fiction.
The following tropes all relate to this concept; please add examples there rather than here.
Tropes:
Related:
- Dominatrix
When portrayed in fiction, Bondage Is Bad. Real ones usually aren't. - Evil Costume Switch
- Sexier Alter Ego
Applies when the alter ego is evil. - Sexual Deviance Is Evil
- Villainous Fashion Sense
- All Girls Want Bad Boys
- All Men Are Perverts
- All Women Are Lustful
- Apocalypse Maiden
- The Baroness
- Beauty Is Bad
- Blood Bath
- Consuming Passion
- Crazy in the Head, Crazy in the Bed
- Cruel Cheerleader
- Draco in Leather Pants (fandom downplays a character's evilness rather than embrace it)
- Dragon Lady
- Evil Diva
- Fan Disservice
- Femme Fatale
- Fetishized Abuser
- Gorgeous Gorgon
- High-Heel Power (when that power is used for evil)
- Hot as Hell
- Kichiku
- Kiss of Death
- Lesbian Vampire
- Literal Maneater
- Madonna-Whore Complex
- The Man Behind the Monsters
- Sensible Heroes, Skimpy Villains
- Sex Is Evil
- Sex Is Evil, and I Am Horny
- Sexy Villains, Chaste Heroes
- Showing Off the New Body
- Succubi and Incubi
- Troubled, but Cute
- Vain Sorceress
- The Vamp
- Vampires Are Sex Gods