Joseph Gordon-Levitt and Scarlett Johansson in "Don Jon's Addiction." Ascot Elite Entertainment Group.

PARK CITY, Utah - If there's a touchstone for this year's Sundance Film Festival, it's sex.

The Sutherland Institute, a conservative group in Utah, has proposed that state funding for the almost 30-year-old film festival be cut on the grounds that its content is at odds with Utah's family values. Irking the institute: "Two Mothers," about mothers who have affairs with each other's teenage sons; "Lovelace," the biopic about porn star Linda Lovelace; and "Don Jon's Addiction," a romantic comedy about a porn addict.

"What would you call a film festival airing movies that explore the lives of porn stars, adulterous relationships between mothers and their friends' children, and teenagers competing to lose their virginity?" Derek Monson, director of public policy for Sutherland, wrote in a blog post. "Many Utahans' values would lead them to call this 'obscenity' or 'pornography,' but to the state of Utah, evidently it is simply 'economic activity.'"

Sundance 2013: The 5 Best Quotes

At a press conference Thursday, Sundance founder Robert Redford said the annual film festival brings in about $80 million for the local economy. "Sometimes the narrowest mind barks the loudest, and we've over time come to ignore it," he said. "It's a free country and maybe they should look at the Constitution."

Many of the stars of the films being debated agree. Naomi Watts, who stars in "Two Mothers" with Robin Wright, said what drew her to the film was not the salacious nature of her character's relationship - though sex scenes are a big part of the movie - but the fact that the movie centers on two strong women who aren't at each others throats, something you don't see often in Hollywood.

"I was drawn to this material right away because of the complex women," she told ABC News Now's "Popcorn With Peter Travers." "They're still bonded and united and they forgive each other. If two women are in a movie together, they're usually against each other. I loved that we got to explore these two women that are beautiful."

Sundance 2013: 10 Things to Watch and Why It Still Matters

Joseph Gordon-Levitt, who directed and stars in "Don Jon's Addiction," said he used porn addiction as a vehicle to talk about intimacy. His character watches online porn because he struggles to connect with real women, namely his latest crush, played by Scarlett Johansson.

"I thought a love story with a guy who watches too much porn and a girl who watches too many romantic comedies would make a funny movie," he said. "That's the case in a lot of relationships. People aren't on the same page with each other. It's a problem. It's no way to live life. It's a recipe for unhappiness."

Tony Danza, who plays Gordon-Levitt's father in the film, said porn is why parents should want their kids to watch this movie.

Octavia Spencer on 'Fruitvale' and Life After Oscar

"I think it's a picture that a lot of fathers and mothers might want their kids to see," he said. "Being the father of daughters, I worry about who's going to be marrying my daughter? And are they trying to live up to something?"

And if morality's an issue, Gordon-Levitt said he thinks traditional Hollywood rom-coms should be reexamined.

"If you want to talk about an immoral movie, those are the movies that are just blindly reinforcing these cliches of love at first site, first kiss … get married and ride off together into the sunset," he said. "It's systematically ruining people's lives."

FULL COVERAGE: The 2013 Awards Season