This Is a Very Strange and Disturbing Movie. It's well made and acted. However, the topic is about a young, serial killer/rapist, who is released from prison and meets another very damaged young person, who wants to use his "services" because she doesn't feel loved. There's no rainbow ending. The convict achieves real feelings; that's the only bright side. The rest is constant sadness and tragedy.
The detective tries to explain how the criminal feels when committing the crimes. The explanation makes no sense, and there's no reasoning given for the origins of his criminal desires. In contrast, the girl's life is laid out in plain view. No explanation needed there: evil stepdad, damaged mom. This movie is a psychiatrist's dream.