Screenwriter Creator/CharlieKaufman's follow up to 1999's ''BeingJohnMalkovich''. ''Human Nature'' is a comedy about a man raised as an ape, a woman who chose to live as one and a doctor on a quest to teach animals table manners. The film has a limited release and only made a fraction of its budget at the box office.

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!!This movie provides examples of:

* AllPsychologyIsFreudian: Exaggerated. Nathan's therapy sessions lead his therapist to the most obvious, highly Freudian conclusions. Nathan commends the doctor's insight; the doctor is bewildered Nathan couldn't come to the same conclusions on his own.
* NudeNatureDance: Initially, when Lila is still covered in body hair, and reprised once she has shed it.
* OedipusComplex: Puff grows up in the lab calling Nathan "father" and Gabrielle "mother." He plots to murder the former and bed the latter.
* OohMeAccentsSlipping: Caught unawares in hr apartment, Gabrielle reveals that she is not truly French.
* PygmalionPlot: Nathan and Gabrille together train Puff into acting human; Gabrielle falls for him.
* InsaneTrollLogic: Nathan reasons that, "If I can teach animals table manners... I can teach humans table manners. Then I can make the world a better place."
* ShamefulStrip: Lila forces one on Puff, training him to return to the wild.
* SpoofAesop: Puff speaks to Congress about how civilization did not improve him. Played differently, this may have been the film's actual theme. But this scene immediately followed Lila, apropos of nothing, telling him "go testify before Congress on the waywardness of man!" and senators follow the speech by declaring, vaguely "we must pass some legislation on this matter."