They were world famous movie stars who were acting like lustful teen agers. When Brad Pitt and Ange lina Jolie filmed Mr. & Mrs. Smith 17 years ago, it didn’t take long for their attraction to ignite. “It was like being in high school and passing notes between friends,” their bodyguard on the film, Mark Behar, tells In Touch in a world-exclusive new interview. “First, Brad hired me, and once the chemistry got going, Angelina was like, ‘I need you too.’ And I was like, ‘I can see where this is going!’ ”
The rest is history: The co-stars fell madly in love, and Brad left his first wife, Jennifer Aniston. Over the next 12 years, the pair went on to raise six kids — Maddox, 19, Pax, 17, Zahara,…
