Ask yourself why it is not OK for men to wear short-shorts to the office, but women are allowed to wear skirts in a business environment that leave almost nothing to the imagination.
Women love to show off their legs (if they have a nice pair) in a way that would be considered strangely vain and exhibitionistic in a man.
And it DOES turn men on.
These women love the attention, but they do not love the inevitable results at times.