You can tell where your youthful hairline is/was by lifting your eyebrows up so that you can see your forehead wrinkle. I call this the furrowed brow, and the wrinkles you see reflect a muscle below the skin (the frontalis muscle which is present in everyone).
The youthful (juvenile) hairline touches the top of the highest wrinkle and has a concave frontal shape to it. In the mature hairline (with its almost convex frontal shape that extends from the temple prominences), shows a gap where there are no wrinkles and no hair present. None of what I just wrote is male pattern balding, yet many of our young readers panic when they see the rise in this hairline and they look to the Norwood Chart to identify where they are in the progression of their hair loss. It is particularly bothersome to the young men when the change occurs slowly and asymetrically. It is even worse when the change produces ‘chewed’ look. This maturing process occurs between 17 and 29 years of age and it is not uncommon to find one side go up faster than the other side. Not all men get a mature hairline (for example, former US President Bill Clinton retained his juvenile hairline — see photo at right) and retention of the juvenile hairline is more common on non-Caucasians as seen in many people from Asia and the middle eastern region.
from this website
http://www.baldingblog.com/2006/10/06/j ... th-photos/
