The female form, or the male form for that matter, :) is nothing to be ashamed of. It is a gift from God for us to enjoy. Yes, there are ways in which we reserve enjoyment for ourselves and our spouse, but there are also ways in which it is completely appropriate to share our physical form with others. To see beauty and appreciate it is not, in my mind, synonymous with lust. If I'm dressed in nice jeans and a cute shirt and I'm happy and my eyes are sparkling and my face is animated and my hair is soft and shiny and yes, maybe I'm showing a socially acceptable amount of decolletage, it is perfectly appropriate for someone to see me and see in me a happy and beautiful woman and enjoy the sight of my beauty as the artwork of my Creator. I am a female, both biologically and culturally, and there is no innate holiness in obscuring that fact. My female personhood should not bar me from worship, from leadership, from respect, from admiration, or from anything that I am gifted and skilled to do. When women are arbitrarily banned from certain roles in the church or from authority or power because of our female personhood, it sends the same message- "to get ahead, be holy, whatever, obscure your femaleness."
When women are told that their bodies are something which must be hidden to avoid inciting lust in men, a part of them can begin to believe that there is something bad, dangerous, or wicked about not only their bodies, but about themselves. They can try to purposely obscure their beauty by unhealthy behaviors to either end of the weight spectrum, or they can become overly focused on trying to please others with the way they present themselves or their bodies. I truly believe that modesty, taught from a perspective of "do this so men won't see you and lust for you or objectify you" destroys healthy confidence and body image. That's a sad, sad thing.