There are cultures where being a man is defined by the ability to fight with a knife. It is just a basic characteristic of manhood. This blog post by a Sicilian guy named Rob is a fantastic description of knife culture. It is also pretty dang effortlessly funny, he has clearly mastered the Dao of bravado. I ended up on that blog after a wonderful talk with Maija the other day in which she told me about the Italian tradition of hiding knife fighting skills inside of local dances.