I was watcing a Scooby Doo movie with my kids this morning and one of the monsters was a Banshee. She was going aroung screaming and damning souls and I kept thinking... 'isn't that a Succubus?' I'd always thought that a Succubus was a beautiful, female spirit that, when she opened her mouth, a scream came out and with it a man's soul would be sucked up. Are they one in the same or two totally different things... like Celtic and Norse myth? Could those two be related to the Sirens of Greek myth, minus the large body of water and ship full of men?