Cameron Diaz on Movie Sex with Her Ex, Justin Timberlake

Actress Cameron Diaz talked to "Extra" about doing the hilarious, fully clothed love scene with ex-boyfriend Justin Timberlake for their upcoming comedy, "Bad Teacher."

"It was the least sexy scene you've ever seen. We took that on as a very serious responsibility to create the best PSA for safe sex," winked Diaz. "To show children that if you keep your jeans on, you can't get pregnant, you can't. Just keep the jeans on. It's a jean jam."

As for the rumors she and current beau, baseball player Alex Rodriguez, are kaput, Diaz just laughs it off. "If I want to read gossip, I read about somebody else's life. I can't worry about what other people say. It's fine to say whatever you want as long as you actually don't know what's going on in my life."

Photos: Cameron Diaz Through the Years!

The actress also gave a little hint as to how she keeps her body in shape. "I've become more disciplined on my diet, which I never had to do because I was skinny," she confessed. "I decided as you get older, it does change. I used to be able to eat fried chicken at 2:00 in the morning with a boat of gravy and French fries and mashed potatoes and not even feel it in the morning. Now, if I do that in the middle of the day, it's like, ugh."

Diaz continued, "I've taken fried foods out of my diet on a daily basis. Every once in a while, I indulge in it, but I don't order the French fries every time. And I've had a longstanding love affair with French fries. I will always hold them dear to my heart."

"Bad Teachers" holds class in theaters starting June 24.