There's a long line of science-fiction/horror films that feature the predatory female using man's sexual desire against him. In Under the Skin, Scarlett Johansson portrays such a character, prowling the streets of Glasgow, Scotland for unsuspecting single men to lure to her lair. What happens to them when they get there, well... it might make you think twice about jumping into the Prisoners van with Black Widow for a little bow-chicka-wow-wow.