Back to tree/forest analogies.   Drive by a Christmas tree farm and you can tell it was not made by nature. Drive by a national forest and all you see is randomness.   With hair, most of us try to make at least the first half inch of hairline on back as random as we can so that it looks natural. That includes making an irregular hairline. Perfectly straight hairlines are not natural. I personally use a laser level to draw a nice straight hairline for the patient to approve placement, the