@BenBarden Here's the text of a comment of yours that was removed from the vampire question: “As far as I can see from a bit of poking about the web, the vampire/succubus connection traces back to a single forgotten realms sourcebook from AD&D 1st edition (Lords of Darkness). It doesn't look like it has necessarily shown up since”

Someone recommended it would make a good answer and I agree

Oh, nevermind, you posted that! Yay!