The Knishman nails the zeitgeist here: Food Fights and Class Warfare.
He is right that weight is a class and/or cultural thing to some degree. There is a sort of logic to it in an era of plentiful or unlimited cheap carbohydrates in the Western world. Being heavy no longer displays prosperity, while being trim and fit shows that you have the ability to delay gratification for more important goals, such as being more vigorous and sexy, and less of a couch potato.
However, unlike Lefties, I don't care what other people chose to be or what they eat. From Knish,
Social medicine politicizes food consumption and a globalized economy politicizes food production. And the politicized American plate has less on it and at a higher price. While the left obsessively pursues its mission of destroying fast food in the name of lowering social medicine costs and being fairer to farmers, what they are truly accomplishing is to take affordable and filling food off the shelves, as they have done with countless other products that they have targeted.
As lefty pols go, in the last photo I saw, Al Gore looked like a fattie, living off the fat of the land. Last photo I saw, Obama looked semi-anorectic for a middle-aged man-boy. Clinton got fat, had a heart attack, and then got scrawny and ill-looking living on arugula salad.
Here is a brief history: The Real Skinny: Expert Traces America's Thin Obsession. What that brief post misses is that, today, in our culture, trim and fit is sexy and appealing to both men and women. In a way, it seems to say that you have not given up on life, or at least that you have not given up on caring about your body. In fact, "studies show" that being trim and fit helps you get a job, or keep one.
I love a Big Mac once in a while. Who doesn't? A Big Mac and Fries is around 1000 calories. To walk that off takes 4-5 hours of vigorous walking, at least. About 3 hours on the elliptical.