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.
It turns on immature men. Legs, high heels, fishnet, etc do nothing for me. They look silly. Visit a nudist club a few times. It will change your perceptions.