Robert Pattinson has sex with Kristen Stewart. On camera. It's kind of weird.

"The sex scene in [The Twilight Saga: Breaking Dawn - Part 2] is pretty ridiculous," he tells The Kyle & Jackie O Show in Sydney. "It's just because you're kind of shooting stuff to be PG-13, and so it's just trying to think of inventive ways to try to make something sexy."

Also, keep in mind that due to the nature of his role, it can't just be regular sex.

"It's supposed to be about, like, the greatest vampire sex you've ever had," he says. "So a lot of it was just closeups on me and Kristen's faces, but there was no one else there."

As an actor, he struggled with that.

"You literally try and give a face of ecstasy." he says. "Guys' faces I don't think are really designed to do that."

[via E! News]