That idea always makes me shake my head, because temptation/corruption was never the succubus's goal; people got that from the whole "sexy + woman + evil = temptress" idea.
Succubi, in older editions of D&D, have always been black widows [insert ScarJo quip here]. They're not trying to tempt you into anything, except a secluded place where they can drain your life force without interruption and then kip off before someone finds your body. That's why they have enchantment powers, since otherwise you might say no. Corrupting your morals is someone else's job.