You certainly have noticed that there are black girls that have darker skin than others. They call it the Von Luschan's cromatic scale (don't worry guys I got that from Wikipedia, I'm not that smart )
I love black girls, but the blackest girls are hard to find. Just like Esha from Abby Winters
http://www.free-abbywinters.com/Esha.html
http://www.naked-elves.com/8/esha/index.html