King Cobra promises to be one of the wildest movies at the Tribeca Film Festival.

Starring James Franco, Garrett Clayton, and Christian Slater, the drama digs into the circumstances of a real-life murder in the early 2000s gay porn scene. But just because it’s set in the porn industry doesn’t mean there are gratuitous scenes, according to writer-director Justin Kelly.

“We all discussed what each person was comfortable with. Each scene or scandalous moment is really only there if it helps push the story forward,” he told EW at Tribeca, where the movie premiered Saturday. “So it’s not just about having sex scenes because the story involves gay porn. It really is a part of the story and pushing characters towards their goals — or not.”

That’s not to say the film doesn’t feature plenty of graphic content; Kelly pointed to a scene between Franco and Keegan Allen as one of the film’s most explicit. “They’re both fully naked wearing these things called ‘c–k socks,'” he said. “It was one of those moments where even though we all know what the movie is about and I wrote it, I still shocked myself watching and directing it. ‘Wait, this is kind of insane. We’re just actually doing this.'”

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See the interview above to find out which scene made Clayton reconsider doing the movie.