Receding pattern?

[Chris12]

Hey guys I'm just wondering about a certain mpb pattern. My father had an interesting mpb pattern that I believe I will follow. I am curious as to why or how it receded in such a pattern that I didn't even know about. He started off with the normal nw2 at about 20 years old and progressed into a nw3 which he held until he was about 42. The strange thing is that the shape stayed a nw3, but his front hair thinned out significantly. There was no thinning on the back of his head just mainly the front. I've never see any posts about that pattern and was wondering how common it was and if it's easier to fight than the further stages of mpb?