“I’ve Never Seen Someone be Catcalled”

I have recently seen more than one commenter on Feministing say this and I, for one, am baffled by it.
Catcalling is something that, unfortunately, I am very very used to. And I have been for some time. The first time I remember becoming aware of the aggressive catcalling being done around me (and aimed directly at me) was when I attended college in New Orleans. I don’t think it was because catcalling is a New Orleans phenomenon or anything, but that’s where I became more aware of feminism and gender roles and that kind of thing. So I think I was just paying more attention to these things all of a sudden. But I’d walk to school from my apartment in a hoodie and jeans, no make-up, looking like I just rolled out of bed…and the catcalls would come. It wasn’t everyday to be sure, but it was plenty often. Sometimes it would be just be a guy just leaning out of the window of his car and honking his horn to show his approval of my looks. Then it could be a group of men hooting and hollering for me to get in their car and show them a good time.
Since then I’ve moved a few times but I’ve always lived in major cities (DC and now back in my hometown of Chicago). The catcalling continues. It doesn’t seem to matter what I’m wearing, although it’s almost guaranteed if I have a skirt on. In the beginning I just rolled my eyes or picked up my pace, avoided the men calling out to me at all costs. But lately I’ve gotten more and more annoyed and yelled back at them, when I feel it’s safe enough to do so. Last week I told someone to shut the fuck up and that he was old enough to be my grandfather, which was true.
I’m not a model or anything, I don’t wear make-up every time I step outside of my house, my clothes aren’t anything special, but these are many of the reasons I hear people list when they say they aren’t catcalled. All my girl friends are catcalled, I don’t know a single one who hasn’t been. None of them are models either. I’ve been overweight: still catcalled. Underweight: same thing. So I guess my question is, and I’m seriously asking this, where do these people live that this catcalling doesn’t exist? Is it just an urban phenomenon? Does it not happen in small towns? Or is it just that it’s more subtle in those types of places where the people know each other so it’s not called “catcalling?” Because these same commenters say they’ve never even seen anyone catcalled either, so what is it? Lack of awareness? What? I just don’t see how it’s possible to never have seen someone be catcalled.