I think that particular photo was manipulated, which is why they are both chewing rapidly at the same rate.
I saw another photo that was real, however, where Obama chews a few times, opens his mouth and chews a couple of times, closes it and chews a few more times, etc.
Not only does the disgusting pig chew gum at the D-Day ceremonies, he smacks it. And to top it off, from what I’ve read, I believe Queen Elizabeth was entering while he was standing there smacking his gum.
Oooh please post a link to that! Viral it will go.