Why do women do anything that they think is attractive or sexy? They want to be seen as sexy and beautiful, not stared down. That is intimidating. Even dogs do not like it. Women do not want men to look at them like perverts or hungry, tongue-lolling hyennas. Some want men to notice, but pretend that they do not. Some want single men to look, but not married men. Some want married men, and some want any men. Last, some do not know what they want.
If women do not want men to shine headlights on them, they know how to cover themselves. I would not worry about women. Women are emotional, a little complicated, and just want to be respected, noticed in a decent way, and loved.