Like fat pirates, fat Superman is a time-honored and loved meme. Fatness, body morphing, and inflation were played for laughs in the early 1960s "Golden Age" of DC Comics. While the body changes were portrayed as negative and everything gets fixed in the end, the tone was still light and amusing, not like today's hyperventilating rhetoric.
Some inflated Superman story art:
Don't know where this came from; love the surprised expression on his face, though.
Awww, someone needs to show Superboy this banner:
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Is that mini-skirted Lois Lane looking on in awe? :D
At least from the covers, it seems that Fat Superman still retains his powers, which is interesting. Interesting, too, how children have to be "protected" from images of fat characters, and yet forty, fifty years ago were supposed to have been some Ideal Era of No Fat Kids. (Right ...) I guess fatness was another one of those "ten-cent plagues" you couldn't catch from the comics after all. Somebody needs to send the memo to the recent advertisers.