Because, you see, our culture has a problem with sex. Sure, we're (men and women both) supposed to want to be sexy, but it is very unclear whether we are supposed to want to have sex. We are also extremely uncomfortable with being naked.
Thus, I argue, our cultural obsession with thinness: thin people can never actually be naked--not even in the tiniest bikini or thong--because they do not have bodies as such. Sure, they can move and breathe, but they don't have any actual flesh to uncover when they take off their clothes. Nothing to be embarrassed about, sure, but nothing to show, either. Thus it is, paradoxically, okay to show their skinny non-bodies on billboards and movie screens in public across the country because the last thing they are ever going to excite is, well, lust.* They are 6' tall children pretending to be grown-ups, not sexual beings at all.
|Right size, wrong size?|
*Which, if they do, should be cause for even greater concern than that they are thin. Just saying.