Ok I'm a man, so I can only attempt to guess at the answer. But let me think about the reverse question: Why do I get a kick out of wearing really good clothes (a suit, tie and a good pair of shoes - just in case you were wondering...) when I am out "on the town"? The answer is the reaction I get from women I meet. There is an undeniable shift in my desirabilty when dressed like that, than if I were dressed casually. So, turning that around, I would say that you feel more desirable, more confident when dressed sexily than when not. I for one am much more attracted to a woman who is dressed in sexy undies. It does have to be understated though to keep us guys guessing.
