What's With Constantly Airing Out the China?

With all the photos of chicks not wearing underwear (see tmz for any you might have missed) it got me asking myself, "What's with all this need to air out the cooter?" I mean, who feels the need to consistently go without underwear? I understand that VPL can be a problem in a party dress but that's what V-Thong was invented for! If I skip underwear I am, like, nervous the whole time that someone will know or I will forget to zip my pants or my skirt will hike up and the world will be blinded. None of my girlfriends feel this need to air the china either...I don't get it. And if you're going to skip undergarments, then why sit like a dude???? Ugh. Tacky Ass.