Where to begin! I admit that I had to watch this movie several time in order catch all of its details and subtle nuances. The title goes to the motivation of the characters. Something that I heard in college, that "biology is fate," also refers to the title. Something the taxi taxi driver says at the beginning to Javier, implies as much. The movies' characters, major and minor, all have one crisis or another to confront. How they handle their particular situation, highlights their character. Some run from them, others confront them. Each has his or her own style. So much for the plot. The photography was great, the acting was very good, the dialogue was exceptional. The ending, and the scenes leading up to it, were just fine. The writers clearly had a point of view, and say it loud and clear. This movie is highly entertaining, and thought-provocative. I would not be surprised if Hollywood re-made this movie.