British actor Robert Pattinson shared the details of his sex scenes with his girlfriend Kristen Stewart in their latest movie "The Twilight Saga: Breaking Dawn Part 2".

Rob is quite busy promoting the final film in the blockbuster franchise and flew to Australia for a photo call.

"The sex scene in this one is pretty ridiculous. It's just because you're kind of shooting stuff to be PG-13 ... it's just trying to think of inventive ways to make something sexy," he said on the Kyle and Jackie O Show.

"It can't just be a normal sex scene. It's supposed to be about, like, the greatest vampire sex you've ever had," he added.

This isn't the first time Rob's expressed anxiety about love scenes. In "Breaking Dawn Part 1," Edward and Bella enjoy a honeymoon while Stewart's character is still human.

The British heartthrob also shared about having an exhausting period when filming the action-packed battle scene between the Cullens and the Volturi.

"This one was hard. I mean, we were shooting this big action sequence for about two and a half months in a massive warehouse where they normally sell cows, with a bunch of fake paper snow and green walls, and you literally started to go insane after a while! Yeah, it gets tough doing stuff like that, it gets a bit repetitive." said Pattinson.

Rob also praised his girlfriend Kristen Stewart's performance and her new role as a vampire.

"But her character has a different thing, because she's supposed to find it really easy," the 26-year-old actor went on explaining.

"It's supposed to be a natural progression for her to become a vampire, it's supposed to be simple. So I guess it was kind of different," he said.

Robert Pattinson will reprise his role as Edward Cullen in the film, the husband of Isabella Swan and father of Reneesmee. The film will open Stateside on November 15, the same day when the "Twilight" movie marathon takes place in selected cinemas in the United States. "The Twilight Saga: Breaking Dawn Part 2" will be shown in theaters on November 16.