With reporting by Josh Horowitz

If all your movie-viewing choices hinge on the question of whether said movie will include an eyeful of Ben Affleck's wiener, then... that's incredibly weird, actually, and you should probably talk to someone about it.

But before you make your appointment with a competent psychotherapist, you can make a plan to see "Gone Girl" when it opens in theaters on October 3! Because Affleck himself has promised that this movie will feature his, er, Big Ben.

"I try to get it in every movie," Affleck joked, after MTV pointed out that the movie includes what may be the first onscreen appearance of his Affl-ick. However, in this case it was director David Fincher who insisted on shining a bright light where the sun don't shine, all in service of a film that captured the no-holds-barred cynicism of its source material.

"It's ironic, because David [Fincher] said to me from the beginning, this is a warts and all movie. It can have no vanity. You have to see the naked underbelly of this character," Affleck continued. And yes, when he says "naked underbelly," he means it literally as well as figuratively.

"There's some brief, ah, very brief nudity, I think," Affleck hedged. But when reminded that people might well be going to see "Gone Girl" for literally no other reason than to get a glimpse of his wang, he capitulated.

"The penis is in there!" Affleck said. "It's IMAX penis! You've gotta pay fifteen bucks to see it in 3D... it's better in 3D."

And before you go saying mean things about Ben's Affleck on the internet, the actor has an announcement to make: "You should know it was very cold."

"Gone Girl" opens in theaters on October 3.