Robert Pattinson
had to endure being cheated on by longtime love Kristen Stewart this summer, but what really makes him cry?

The "Twilight" hunk sat down with The Kyle & Jackie O Show in Sydney, Australia, where he's kicking off the promotional tour for "Breaking Dawn - Part 2," in theaters in the States on Nov.16.

When a Twitter fan asked which movie makes the 26-year-old cry, he replied "'Marley and Me.' I was so surprised, I was like devastated."

The softy continued, "Literally I never want to see it again, it was horrible. It was like looking at war footage. I can’t take it, I hate people, but I love dogs."

Watch the interview above to see Rob get embarrassed about his Starbucks order, plus open up about the sex scene with (his on-again girlfriend?) KStew in the flick ... which he calls "pretty ridiculous."

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