How bad is it guys?

[DONTLOOKATIT]

Alright so I've noticed I have a very thin spot of the back of my head. The question is though how bad is it? How much worse will it get? And why is the whirl area losing hair but no where else. I'm not depressed about it or anything but I imagine shaving my head everyday would be pretty annoying. I've asked my friends and family and they keep spouting out the classic "itsa cowlick bro" phrase, let me tell you, that ain't no cowlick that's a damn cow BITE and that is balding.

http://www.ultraimg.com/image/YoYI

http://www.ultraimg.com/image/YoYD