Also from the game last night
As I stood at a urinal while a fellow fan struck up a conversation with me about the Yankees pitching staff, I realized something about the citizens of this great city. We are constantly walking the fine line between being complete strangers and intimate friends with each other. We live, commute, do laundry, drink, eat, pee, walk, sit close to each other. This physical proximity/intimacy leads to a certain feeling of emotional closeness among us. Most often this subconscious affinity lies dormant under busyness and indifference but there are those few moments when you connect with a complete stranger and interact as if you have known each other for 20 years simply because you are constantly living close to 8 million other people.
(Or maybe the guy was just a creepy old man who likes to talk to people while he pees. Another, equally/more valid psychosocial explanation for his behavior and commentary on the population of New York.)