the laughing couple by the newspaper kiosk , the solitary , sallow man looking dourly at the windows of a store for erotic `` aids '' of latex and leather , the young , apple-cheeked man clad in a fleece-collared denim jacket , with a camera hanging from a strap around his neck-all would move along momentarily , and all could be replaced by people of a similar profile , who would avoid eye contact with one another but would be invisibly connected by a common coordinator .