What is it about Halloween that makes otherwise responsible women embrace their dark-and-dangerous sexy sides? Every year at Halloween parties, you find office workers dressed as Sexy Cats, librarians disguised as Sexy Ghosts, computer technicians made into Sexy Dorothys ...must be all the witches' brew. To help you celebrate the holiday that's so seductive it's spooky, we've found some original costumes that can help you get in touch with your inner monster—and that offer some fresh alternatives to the so-overdone-it's-a-sin Sexy Angel get-up. Hold on to your broomsticks...

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