It's safe to expect scores of sex scenes from "About Last Night" -- the film adaptation of David Mamet's 1970s play "Sexual Perversity in Chicago." The movie, like the stage production and Edward Zwick's original '80s big-screen adaptation of the same name, examines the sex lives of two couples.

While most people would be uncomfortable shooting scenes in the buff, star Kevin Hart described it as liberating during the film's Pan African Film Festival premiere on Feb. 11.

"That's the only reason why I signed up to do the movie so I could do sex scenes," he joked Tuesday on the red carpet. "That's it, nothing more."

And what was so freeing about the experience?

"My balls was out," he deadpanned. "I had no drawers on. That's probably the most vulgar part, but it was cool. It was like in a good way. Me and Regina (Hall) had great chemistry."

Although Hall agreed about their on-screen compatibility, she wasn't as giddy about their love scenes.

"Isn't it always liberating for a man to be clothes-free?" she asked, feigning annoyance. "I like when my clothes are on on a set. That's a different type of career when they're off all day. That's a different type of movie."

Although his love interest in the film, Joy Bryant, didn't mind his minimal wardrobe, Michael Ealy said the film's crew was begging him to cover up.

"There was about a week where I felt like I was just walking around in the tiniest piece of underwear," he said. "I felt so bad for the crew 'cause they were like, 'Come on, Mike. Come on, man. Put on some clothes, bro.' And I'm just like, 'Sorry, sorry, sorry.' It really was kind of mortifying in that way."

Like their characters in the film who hurled insults at one another, the trio bantered about the color of Hart's silk maroon suit when crossing paths on the red carpet at Hollywood's Cinerama Dome. The comedian insisted that it was merlot and not burgundy or pinot noir, as his costars suggested. Hart also commented on Hall's attire: "I see your cakes are out," he said about her cleavage-baring dress. "Cakes, cakes, cakes, cakes!" Hall teased, playing with her breasts.

Although more sexually explicit than the 1986 film starring Rob Lowe, Demi Moore, Jim Belushi and Elizabeth Perkins, director Steve Pink said there's nothing perverse about this modern re-imagining (penned by Leslye Headland).

"I think it's raunchy and fun, but it's just exploring the ridiculous fun that happens in bed," Pink said. "I don't think anything is over-the-top because it's all contextualized. The kind of fun, ridiculous raunchiness that goes on between Kevin Hart and Regina is all natural to those characters. They don't think they're being too raunchy. We weren't trying to be provocative just for its own sake. We were always within the context of story and characters."

In the film, Hart's character Bernie tells Hall's Joan he's Jewish to avoid introducing her to his parents (this isn't a spoiler if you've seen the trailer) so the cast divulged the biggest lies they've told significant others.

"I told my girl that I liked her cooking the other day and it wasn't that good," Hart said out of earshot of girlfriend Eniko Parrish. "I still ate it, but I didn't like it. I just ate it 'cause she was looking at me."

Hall, on the other hand, had a darker confession.

"I didn't do it," she said. "I didn't cheat. I don't know him."

The Sayers Club after-party brought out John Legend, T.I. and Clint Culpepper.

The Screen Gems film hits theaters on Valentine's Day.

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