Evil Is Sexy - All The Tropes

Other factors being equal, evil characters are sexier.

Breaking down the tropes in Scott Pilgrim vs. the World

Dream Reaper: Cross, Alistair: 9798694904995: : Books

Vain Sorceress - TV Tropes

What Arya's sex scene in 'Game of Thrones' got right about young women and sex

Lovable Sex Maniac - TV Tropes

Kuroinu Kedakaki Seijo wa Hakudaku ni Somaru/Characters, Tropedia

The Lure of the Devil: A Reverse Harem by Hadley, Auryn

Villainesses Want Heroes - TV Tropes

In Love with Your Carnage - TV Tropes

Sexy Villains, Chaste Heroes - TV Tropes