The Film: Lars And The Real Girl (2007)

The Inappropriate: Anti-social Lars Lindstrom lives alone in a converted garage. When he gets himself a girlfriend, his family is delighted. Until they discover she’s actually a sex doll purchased online.
 
How They Make It Work: As Lars begins to process the tragedies of his past, he comes to realise that he doesn’t need Bianca and can actually begin to have human interactions.

Bianca ‘dies’, and it’s implied that Lars will start seeing (the very human) Margo instead. Attaboy.