I’ve been riding the subway more. I don’t know why. I’ve never before been particularly masochistic nor do I generally enjoy close physical contact with strangers. It just seems an economical way to get around the city now that every available road surface is jammed with multi-colored bicycles. Having spent quite a few commuting hours below ground of late, I’ve started to distinguish a taxonomy of my fellow passengers, including several species which I find it best to avoid.