Sexy clothes at work, pros and cons

What should you wear at work? Even if there's no dress code or it says you can wear casual style, it's still a big question what you can wear and what you should avoid. Even though these days we propagate free mind and the right to be individual, you know there are certain limits in office clothing that you shouldn't cross. If you represent a serious company, your clothing should be appropriate. What about sexual dress at work? If you want to express your femininity (or manliness of course) in your style, should you stop or should you go?