If Powergirl were shown lusting after a character in the story, that would be different. (And if she were being drawn with impossible anatomy, a broken spine, and in a passive stance that is completely out of character, that would still be sexist image.) Put the Micheal Turner PG cover? That's showing her lusting after the viewer. No, not even lusting. She's just standing their passively, inviting the viewer to lust after her. She's not even displaying any emotions. That is the DEFINITION of objectification. That is INHERENTLY sexist. She's being displayed for the viewer to wank over, not being displayed as a character or as a person.

If you'd like to see an example of lust done right, I'd point you to the Black Canary/Green Arrow wedding cover solicit. (http://girl-wonder.org/forums/viewtopic.php?t=2488) Those are two characters clearly lusting after each other, but they're not displayed as passive fuckdolls in the process.