Some would carry weapons, knifes or a gun, to feel like a man. A scar would mark them also as a man. My arm has a small scar, but it is not of a knive, nor of fighting, but is from a tool. It is small but can be seen, amongst the oil on my arm. It threatened not my vein. I carry not any weapons. I sometimes carry tools for essential maintainenace. I hesitate to, for they are also metal, and weapons are metal. I am not a threat, these marks on me are not to intimidate.