There are tons of reasons to carry a knife. I carry one for the utility (I'd love to say for self defense, but that's not why I carry one), and just because I love knives! Not much else to it really, I feel naked without at least 2 of them. When people ask me why I carry a knife (non knife people) I simply reply "because I can". Let's be honest, carrying a big beefy folder is just fun..