June 20th, 2011
11:34 AM ET
In the upcoming raunchy comedy "Bad Teacher," Cameron Diaz and Justin Timberlake play high-school instructors who explore the subject of the birds and the bees with a fully clothed sex scene. For Diaz, getting intimate with her ex-boyfriend wasn't nearly as awkward as it might have been with another actor in the role.
"That would have been kind of weird to do with someone I didn't know and trust," the actress, who dated Timberlake from 2003 to 2007, tells the L.A. Times. "With somebody else I may not have known where it stood, but we know where it stands."
Diaz added that Timberlake gave his all to their over-the-top encounter.
"The faces he made are so brave," she says. "What guy would ever make those faces? The noises. He was like, 'I'm creeping myself out.""
See the exes in action when "Bad Teacher" arrives in theaters June 24.
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