Quote Originally Posted by mainaman View Post
I do not think there is a consensus on what it is for, for me it is cosmetic feature.
Cosmetic for me too. Other explanations that I've heard are that it allows barbers to open the blade more easily with wet hands (can just about see that one) and, allows barbers to mark moles etc to make them easier to avoid (don't even understand that one). I think they just look good but am open to correction.