Movie is the ultimate in hypocrisy.
I guess the moral of the story is that beauty is on the inside, and do not judge someone by their looks and/or their weight. Well, that's nice.
So to get the point across, the movie takes someone who is tremendously obese, and makes all kinds of fat jokes. You have the cannon ball in the pool scene, rowing the boat in the air, pigging out at the restaurant, and he even sleeps with her.
Look at Hal! He's dating a FAT woman! Isn't that hilarious!? Doesn't he realize how ridiculous he looks? Ha, ha, ha!
Of course Hal only sees a beautiful woman. You know, beautiful, like Gwyneth Paltrow. You need to look like Gwyneth Paltrow to be beautiful.
So to summarize:
The producer/director makes a movie full of fat jokes, so that they can make money by making fun of fat people.
The viewer should enjoy laughing at the fat jokes, but then the viewer should feel ashamed, because the moral of the story is that beauty is on the inside.
It kind of reminds me of the Breakfast Club.
We are presented with five stereotypical high school students, and the moral of the story is that you should not stereotype people.
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A dope trailer is no place for a kitty.