I agree with yin (as I sit here in my chair with no shirt on eating chips). While taking 'lady-like' too far is simply annoying, to have propriety is not a bad thing. It is way to show respect to your fellow humans. While I am not always a gentleman, I do my best on that 'night out' or a first date, or any other time I feel it is appropriate. Whenever this happens, I expect my date to act with the same decorum. I guess you would call it acting lady-like. And yes, I believe that my generation (those yet under 18 ) are severely lacking in this area.
edit: 8 ) without the space =

, and I had to fix it...