I think it all a matter of personality and style. It is not wrong for men to use/wear nail polish as it is not wrong for women to use men's razors to remove hair from their legs. Another example would be, women who like to wear big men’s watches, or women who like to accessorize with men’s dog tags. Do those make them less of a woman? No! The only thing is that society in general tends to be more forgiving to women than to men on these issues. But the point here is, what is wrong? Child molesting, murder, stealing, spouse abuse, animal cruelty, and I can go on and on, but men wearing nail polish? I don’t think so. Again, the way you wear it has a lot to do with how it is perceived.