Because a woman wants the attention that she wants and she does not want the attention she does not want. If men would just learn to tell when a woman is looking at him like he's being tiresome, these problems would be solved, but men seem unable to process women's facial expressions. Too busy staring at other things, I suppose.
Really? This is sarcasm, right? We men are supposed to read facial expressions? What's wrong with the spoken word? Men can take reality.