Does it also depend on what type of girls you like?
Someone wrote that Ukrainian, Hungarian and Czech girls are the most beautiful. I can confirm this, in fact most nude sites have beautiful Ukrainian girls.
And a story for this:
I worked for a media company some years ago, and they spreaded adult contents too. My task was to upload some light-porn contents to the web, from a DVD disk.
There were lot of folders, every each folders had a video file and a sub-folder. And what was into the sub-folder? The full data of the models: short CVs and their Passports.. yeap, their passports..
Two interesting facts: the girl on the passport was tottally diferent from the girl on the video ( but guys you can understand.. hair dresser, make up, etc.)
But the other thing: all girls were Ukrainian..