Somehow, somewhere, someone decided that it was perfectly acceptable for women to dress in nonexistent clothing and parade around as if every street in America was Bourbon Street.
The origins of the first slutty Halloween costume are unknown, but over time the concept grew into a totally socially acceptable way to dress in public.
Thanks to the Internet, it is incredibly easy to obtain the sluttiest garment possible, lest one friend out-slut another.
Happy Halloween, and best of luck to you with that Sexy Ghostbuster and/ or Sexy Girl Scout (which is not at all weird or creepy.)
Here are the 50 sluttiest Halloween costumes out there.