Okay, I admit it. The only reason I rented this film was to see the gorgeous Phoebe Cates and those nude scenes which seemed to have gained more fame (or infamy?) than the actual film itself.
As many others have pointed out, this film borrows heavily from the Blue Lagoon but somehow manages to strip the emotion and warmth out of the formula.
I wandered through this movie totally oblivious to the death of the parental characters and I audibly yawned when Joffrey the minder died. Too much time is spent wasted on ridiculously stupid chimp scenes which one could over-intellectualise and proclaim as being a raw and uninhibited metaphor of the lives of Sarah and David, but in reality are there for cheap gags. As a result the movie seems too short even though you get the distinct feeling you have been sitting, watching it for a long time.
The continuity and time-span of Paradise seems horribly distorted. By the end of the movie you would swear that the two "cast-aways" had been lost out in the desert sea for no more than a couple of weeks. However, when Sarah conceives a child (towards the end of the movie) and she feels it kick in her womb (perhaps 20 minutes later) , you realise that the time span of the movie has been horribly compressed. As a result, I was left feeling baffled and rather surreal. There was no sense of extended isolation, self discovery or sincere empathy towards the characters as they never really seem to be in danger. Similarly, Paradise does not, nay cannot emulate the irony of Return to the Blue Lagoon, where Civilization is portrayed as the great destroyer or unmaker. The characters in The Blue Lagoon are wholly dependent on their little island, where as the oasis in Paradise seems like nothing more than a stop-over enroute. It's sad that it is nothing more than a rip off of The Blue Lagoon that misses the critical factors that made The Blue Lagoon so good.... but that's what it is.
In reality there is only one reason why you would want to watch this movie, and that is for the nude scenes of Phoebe Cates.. and trust me, they give the movie legs.