The couple in front of me has just met on the train. They are sitting on facing benches, her feet stretched out to rest on the seat beside him. They have been talking since I boarded the train, and who knows how long before that, and they have yet to exhaust the subject of Starcraft, its story, its characters, its levels, and most of all its techniques, comparing sequences of keystrokes that have been painstakingly ordered for maximum efficiency. He has taken out a notebook to read the more complicated series, the ones too long and complex for memory, and she follows with interest, takes notes into her phone. His last words as he exits the train are a promise to play her online.