When I drew close to the up escalator, I involuntarily transferred my paperback and CVS bag to my left hand, so that I could take the handrail with my right, according to habit. The bag made a little paper-rattling sound, and when I looked down at it, I discovered that I was unable for a second to remember what was inside, my recollection snagged on the stapled receipt. But of course that was one of the principal reasons you needed little bags, I thought: they kept your purchases private, while signaling to the world that you led a busy, rich life, full of pressing errands run.
