Kevin Smith’s upcoming comedy Zack and Miri Make a Porno, with Elizabeth Banks and Seth Rogen, may actually be a porno. No, seriously. The MPAA is trying to slap it with an NC-17 rating, meaning you’d have a tough time seeing it down at the megaplex.

So what’s in this thing that makes it so, like, porny? We asked Seth, and here’s what he said…

“It’s like a romantic comedy,” Rogen told us this week, at the press day for The Pineapple Express, which opens in August. “It’s a romantic relationship movie—with a lot of porn and balls.”

Wait, whose balls? “My balls are not in it,” he clarified.

Still, Smith is fighting for an R rating, as he did when Clerks first got slapped with an NC-17—simply for dirty language. “You can disembowel someone in a youth hostel in Romania, but you can’t show people having sex,” Rogen said. “I think it’s weird.”

If Zack and Miri does get an NC-17, Rogen thinks his hit flicks Knocked Up and Superbad should have, too.

“This is not anything outside of what we’ve done before,” he told us. “The word porno is in the title, and that kind of freaks people out.”

Well, that and the balls, maybe.

From E! Online