One day a woman on a subway platform called out to me, “Go, Jets!” while raising her fist. Puzzled, I looked behind me and saw no one. Then I remembered: I was wearing a Jets cap.

A month ago I discovered the hat in my closet. It’s green, with the image of a white airplane labeled JETS. (The Jets are a New York football team.) I have no idea how the hat got there. It’s cloth, not polyester, and reasonably clean but a bad color for me, emphasizing my slightly greenish pallor. My last cap, which was bright red and advertised the Linux computer operating system, was more flattering but got lost at a Buddy Guy concert.