Karl Lagerfeld has an alleged affinity for Vienna sausage and Taco Bell. He owns dozens of iPods, scattered throughout his estates all over the world, to which he has transferred a collection of over 60,000 CDs. He admires prostitutes but hates feigned interest, and will stamp out longtime friendships for any perceived impediment to his morale. Karl Lagerfeld is the supreme weirdo enigma of the fashion world. Don’t believe us? Well, you should watch Lagerfeld Confidential, the new documentary by French director Rodolphe Marconi. (If you're in NYC, it premiers today at Film Forum.) Shot over the course of six months, Marconi was able to capture the intimate ruminations of the pony-tailed and paper-collared erudite. We asked him what it was like to slip into Lagerfeld’s cognitive nooks and crannies.