"Two strangers pass in the middle of the night on the street."
"One man looks at the other as the other looks at him. They exchange not a word, only a token from each of them to the other and the brush of hand as they pass."
"Sebastian, what is the point of this?"
"Please be patient, young master, and I will explain it."
"Fine, continue, then."
"No one else is around on the street to see them; it is completely deserted."