Riding my bike home from work I decided to go through Piazza Affari to check out the Borsa. I was left gape-mouthed by a gigantic middle finger. I wasn’t sure if it was an accident or not. It’s not. By Cattelan, and mild by his standards — recall the infamous Hitler piece of a few years ago, and his hanging children. I’m all for eye-turning pulbic art, but one must wonder — who’s getting the gesture here, and who is giving it? Or is that the tantalizing ambiguity? I’ll ponder…