Back in 2006, there was a huge go-round in the feminist-and-comic-reading community over this very thing, and out of that came a couple of things that illustrate the differences between the way superhero men are drawn and posed and the way superhero women are.

First, and there were several other posts by other people doing the same thing but I can't find them right now, someone posts a response to a Frank Miller cover, in which she imagines male superheroes on covers posed in ways that emphasize their sexual characteristics the way women are: http://odditycollector.livejournal.com/97166.html

And about the same time, someone scanned a series of pages (http://ratcreature.livejournal.com/175099.html) from some sort of How To Draw Comics book. vito_excalibur parodies it by simply redrawing the images of women as men and men as women (http://vito-excalibur.livejournal.com/114588.html) - keeping the poses the same, just changing the gender. See how that completely changes the dynamic and shows the different ways in which the genders are objectified?

I'm not against a certain level of sexual objectification - I mean, I appreciate Hugh Jackman's Wolverine on, shall we say, many levels and have zero problem with the fanservice in the movie - but superhero men get to be characters first and idealized objects second, while the women get to be idealized objects first and characters second.