That costume, and a lot of others now, are just an excuse for someone who wouldn't normally do it to cram into a tight dress and push their tits out.
Halloween costumes then:
Nurse
Witch
Pirate
Halloween costumes now:
Slutty Nurse
Slutty Witch
Slutty Pirate
Oh well. It doesn't bother me, per se. People should do what makes them happy. I think it is just the fact that it pushes women more into the porn star, media-created image that they are expected to embody (starting at an earlier age each year) that I have an issue with.