Here is a video of your natural point of aim and how to find it:
http://www.youtube.com/watch?v=dQtY2gkUM0Y
http://www.youtube.com/watch?v=dQtY2gkUM0Y
Sure there is and it has nothing to do with the design of the firearm. It is the position where it feels most natural/comfortable. There is no tension coming from the right or left side of the body. If you don't understand the concept of a neutral grip/stance then NPOA won't make sense. Knowing how to use it is even more important.There is nothing natural about POA, it is what you are taught or not taught.