Succubi are demonic inhabitants of a plane of existence known as 'Void' or 'Abyss'. They have always been connected with sexual pleasure, and thus becoming one of the favorite research topics for all kinds of priests and wizards alike. It's a misconception. Their allure is real, but encounters with them lead mostly to pain. However, true Abyss appreciators enjoy the challenge to their pain threshold, since extreme experience is what leads to true understanding of Abyss' ways. Succubi aren't powerful melee combatants, but they are very elusive, as expected of Void creatures.