Some examples with descriptions/stories from the photographer:
This guy was huge, mohawked and tattooed. A real intimidating character - then he smiled.
I found this man on 7th Avenue in Park
Slope. He was leaning heavily on his cane, looking down, wearing a
grimaced face. I felt bad for him, so I smiled and waved when I walked
past. His face changed completely. He lit up, smiled wide, and gave me a
cheery greeting. There was nothing forced about it. He seemed like a
man who went through life looking for the smallest excuses to be happy.
I
walked 50 feet down the sidewalk, turned around, and walked back to
him. “I want to take your photo,” I told him, “because of how big you
smiled when I walked by.”
He said: “Well I saw someone smiling at me who I didn’t even know. So I thought: ‘By God! I Better do something!’”
I love that there are cultures where a father and son can walk arm-in-arm without a hint of self-consciousness.