Just another example of humanity's infinite stupidity. You can kill practically everyone in that game, but only up until we start seeing bare mammaries that have to be unlocked with the use of 3rd-party mods do they notch up the rating.
Add me to the list of people who are pissed about the ESRB and unattentive parents considering something as minor as a pair of naked breasts worse than any violence. Sure, sex can go way too far, but it's not much compared to those who murder in the most grisly ways possible.
Hell, why don't we up the ratings of Morrowind as well? Or even games like Quake and Unreal that have nude skins?
It's just skin, people. Just because someone glimpses a teat doesn't mean they're going to turn into sex-crazed rapists or anything like that...then again, humanity's pretty fucked up like that.
...Okay, so I basically re-iterated my points over and over. But I'm PISSED!