When I Wash My Hair, More Comes Out From the Top than The Sides

I am 33 and have receeded to what I hope is just a mature hairline. I have noticed that when I wash my hair, I get at least twice as much hair coming out from the top of my head than the sides and back. Is the hair on top of the head more prone to coming out, or is this a sign of hair thinning on top?

If you are prone to male pattern baldness, you should expect significant miniaturization before see any baldness. You should get your scalp mapped to help determine just what is going on. It may help you to predict your future hair loss.