Perfect nonsense, unwisely played for full-bore existential angst (when you keep saying "smell" - as in "sense of smell" - it's like saying "sausages", there's a silliness attached to it; it doesn't really go with cellos and mournful pianos). Last half-hour does build a dopily memorable keening sadness, and the theme - humans are infinitely adaptable, which is both their triumph and their tragedy - deserves a better movie.