Must a Girl lose her modesty to impress a guy?

Not true. While the media sells sex, you don't have to do so to impress a guy. I've never been one to wear that sort of stuff unless I'm going to a club, and I've had no problem getting guys. As a matter of fact, you'll attract the wrong sort of guy, I would think. There are plenty of ways to be sexy and still be modest.

A lot of womenin the US think of sex as something they can sell, either directly or indirectly (get free entertainment, an advancement at work.) and so they dress accordingly, to try to take advantage of guys who can't resist such women.

And a lot of guys are trained by US society to value women by not only their looks, but how willing they are to show them off, and how willing they are to have sex in exchange for what they want from the guy.

There are a lot of women who are not too much like that.but not many in the US who don't have a least a part of their personality involved in the Playboy philosophy, although of course they would never admit it. Oh no, we're modern women, we are 'smart', we certainly aren't sluts.we demand respect.

BUT.they generally won't do anything to earn any respect.

But their behavior is more telling than their words, no?

I agree with you that it shouldnt' be that way.but it's a question of the whole culture, not just a few individuals, unfortunately.