"I don't know. Maybe a flatlander like me can't live at that altitude."
Those are said at the end of the film. For her, who mixed in love and sex, is clearly to know love in life. When you are loving with someone, you hope he killed you softly. However, that is not him, not the real one.You loved the breath with him, even his bad habits.
It is only love, not your life.
Sadly,we can't see secret in his heart.