James Hetfield has lent his dulcet vocal tones to a new documentary addressing the dangers of pornography.

Addicted to Porn: Chasing the Cardboard Butterfly, is the second voice-over project Hetfield has taken on in recent years, after voicing the 2014 History Channel doco-series The Hunt.

A film synopsis explains: “Like it or not, porn is here and it is harmful. In this controversial film, award-winning film maker Justin Hunt dissects the impact of pornography on societies around the globe, from how it affects the brain of the individual, to how modern technology leads to greater exposure to youth, to watching it literally tear a family apart.

“In what may well be one of the most devastating issues in modern culture, this film will break down the damage that porn is doing to us a human race and leave you thinking that it’s clearly time that we start taking porn addiction a bit more seriously.”

You can watch the trailer for the film, below, although there is no Hetfield in it. The film will be out in April.

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