The main theme in this film is the journey from innocence to adult hood. Everything that happens as the movie progresses is a symbol or representation of how David is "growing up" and dealing with reality and who he really is. In the beginning of the film David and his friend Jack are very lighthearted and have a carefree attitude about the world. They don't take many things seriously even when adult around them are trying to warn them, however cryptically, about the dangers of real life.
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