Superheroine poses have gotten so ridiculous that even a trained contortionist can't imitate them. But if you need more evidence, just check out the awesome new Tumblr called Escher Girls. The motto: "Float like a Butterfly. Sting like a WTF?!". There's example after example of the completely insane, antomically incorrect poses women strike in comics — plus a great comic that rebuts the "false equivalence" argument that says men are depicted in equally ridiculous ways. [Escher Girls, thanks Spocko!]
News Flash: Women are little more than sex objects to teenage boys. It's been that way since the dawn of time. Anyone who thinks comics need to "grow up"—in terms of sexual sophistication—needs to remember who the target audience is (hint: if you snarkily smirk at such over-sexualized depictions of women then it isn't you).