When I first moved to New York City, circa ’79, one of its striking, universal characteristics was how observant the inhabitants were and their high quality, humorous and constant kibitzing.
Dictionary.com: 1927, from Yiddish kibitsen “to offer gratuitous advice as an outsider.”
In those days, the idea that a New Yorker would have to be told, “If you see something, say something” would have been crazy.
No more. Why? Sadly, everybody is absorbed in their screens.
However, somebody is still watching you and commenting. Here are sketches of New Yorkers today plus a Munch and a beautiful nude (Michelangelo.)