Why can't women just be left alone concerning weight issues?

So if women gain weight, society will condemn them. If they lose weight and become skinny, society would also condemn them, calling them anorexics. SO what the heck are we supposed to do? If a woman is average like say....Jennifer Lopez, they'd still somehow say that she needs to lose some weight. Besides, what's wrong with eating whatever you want and gaining a little weight??????????????????????? When I gain weight, people pester me about it, when I lose weight, they ask me "ohh are you sick? what's wrong? You're not eating enough...blah, blah, blah."