"Philosophy" seems a bit far fetched. I had always a liking for knives and cutting tools. As far as I remember, I was always keen to have a sort of knife in my pocket, on my belt or in my pack. I still feel weird when I forget to pocket a knife in the morning (although there's the necker, the folder on the keychain, the folder in the purse, sigh...). It's more a kind of lifestyle, if I'm pressed into theorizing it. I keep "philosophy" for those night long talks around the fire with a bottle of scotch. There's some good philosophy flowing...