http://image2.clips4sale.com/accounts10/26068/clip_images/DIRTYFEETpatguerraCLIP4.jpg (http://www.clips4sale.com/studio/26068/2757849/)
http://image2.clips4sale.com/accounts10/26068/clip_images/DirtyfeetLETICIAMILLERclip4.jpg (http://www.clips4sale.com/studio/26068/2712321/)
http://image2.clips4sale.com/accounts10/26068/clip_images/dirtyCamilaCLIP5.jpg (http://www.clips4sale.com/studio/26068/2612440/)
http://image2.clips4sale.com/accounts10/26068/clip_images/dirtyCamilaCLIP2.jpg (http://www.clips4sale.com/studio/26068/2612418/)

I've seen a few of those films (but not many of the dirty feet ones.) Appears to be clips from brazil fetish films and internet affiliate marketing...of course it looks less conspicuous coming from a blog.