FINALLY, someone gets it!
Now, I don't consider myself a feminist at all. I like it when guys hold open doors for me, take care of me, and act chivalrous towards women in general. I also find the fact that the above link is called the "Good Men Project" a bit disturbing. But I can most certainly agree that shouting to a girl in the middle of the street telling her how nice her ass is, is most definitely not the way to her heart.
When you do that, you're pretty much saying, "hi, I only see you as a piece of meat, so I am going to treat you as such."
I've spent a good majority of my teenage years/young adult life getting these sort of cat-calls. And let me tell you now, it is most certainly not due to the way I dress. I've had this happen to me in the summer, fall, winter, and spring. Whether I am dressed head to toe, or in a pair of short shorts and a tank top, I will be the recipient of this kind of unwanted attention. I don't ask for it, and I most certainly don't want it. Sometimes it's nothing more than a whoop or a holler, a car honk, or a whistle. But sometimes it's something more degrading like "I WANT TO SUCK YOUR P*SSY."
Honestly, I could go on and on about how inappropriate is kind of behavior is to women and the underlying issues that arise with it, but I think this article sums it up quite nicely. As you can see, there's a very clear distinction between going up to a girl, introducing yourself, looking her in the eye, and telling her that she's beautiful...or telling her that you'd like to f*ck her titties.
Don't do that.