Locating a proper hairline!

Why with eyebrows raised up? Is that how the rule of 3rds supposed to work? Distance from bottom of nose to eyebrows line should be the same as the distance from eyebrows line to hairline? But that should be properly done with eyebrows lifted high?

The hairline ends at the frontalis muscle when you are 5 years old. Ask a 5 year old to lift their eyebrows and you will see their upper middle hairline touch the highest crease of their furrowed brow. The juvenile hairline is always located there. and as a male matures his hairline without balding, it will go up one finger breadth above that highest crease and change its shape from concave to convex taking in a V-Shape.  That is why I I always ask my patients to raise their eyebrows, to determine the proper location of the hairline.