Sure you want to commit to that blanket statement? Do you expect every woman in every room you walk into to stop and think about why you didn't draw her attention, and then come and tell you?
I can't speak for adrianwaj, but here's my approach:
In general, I'm not seeking sexual interest from every woman in the room. In fact, there's quite a few I'm specifically seeking to avoid.
For those I am interested in, I make every effort to look good and be an engaging, interesting person. I'm fit, I dress well, I'm good looking and can engage strangers in conversation easily, and usually make them laugh.
If a woman I'm interested in still isn't interested in me after I've engaged her (and provided I'm still interested in her after the conversing with her) I ask myself why. If I don't know the answer, I think it's quite reasonable to politely ask her.
Conversely, though, I'm prepared to accept her reasons why. For example, she might believe that I'm rough, but even if I know this not to be the case, I know there's a reason for this perception.
Or she might prefer something I'm not willing to be - eg, really big guys - I'm tall and thin and can't be bothered spending more than a few days at the gym. Fair enough, it would have never worked out.
But sometimes I find out something that's really valuable, and I can take that and work on it. I have to be in a frame of mind that makes her comfortable to be honest and direct.
Unfortunately, there's probably a lot of guys who don't realize there's a reason behind her perception, or who would argue about why they're they the right guy. These guys make it hard for girls to be honest for those of us who are interested in the basis for a perception, rather using it as a pretext to continuing to attempt to be accepted.
These also have no idea how many other great looking, witty girls there are, and put too much value on one opinion.
Sure you want to commit to that blanket statement? Do you expect every woman in every room you walk into to stop and think about why you didn't draw her attention, and then come and tell you?