My theory is that Tony Leung was placed into films by the big tobacco industry. He just makes it look so good! Then again, Wong Kar-Wai could make coughing up a lung look absolutely exquisite.
What is it about smoky atmosphere that conjures up such sensuous longing? Well Wong Kar-Wai gets it. Cigarettes are like a perfect union between his solitary souls, or fallen angels. What some would consider a bad habit becomes a revealing character trait in his hands; tracing the repetition, the delayed exhale, and the slow burn of inescapable emotions.
Note: I do not advocate smoking unless accompanied by a great cinematographer.