Apparently, kissing Robert Pattinson is a laughing matter. An insider on the set of the currently filming Twilight sequel Eclipse has been spilling secrets and one of the more amusing revelations is that, after filming their kissing scenes, Robsten burst into laughing fits. The set insider said, “Kristen’s the first to laugh, cracking up like a schoolgirl.”

What’s so funny Kristen? Kissing RPattz is a very serious matter!