Yesterday I fell into a conversation with an acquaintance. We began discussing my hobby of constantly preparing for calamity, catastrophe, and collapse. I told her I spend about $20 a week on my habit. "That's ridiculous," she said. "That's crazy!" She was smoking a cigarette, and crushed the butt out. "Twenty bucks a week? You're wasting your money!" she said. I asked her how much she spends every week buying cigarettes -- was it equal to twenty dollars a week? More than that, she conceded. "So, let me get this straight," I said. "You spend twenty bucks a week on something that's pretty much guaranteed to kill you, and I spend twenty bucks a week on something that's pretty much guaranteed to keep me alive -- and I'M the one who's crazy?"