Zombie Cliché Lookout:
In most zombie stories, characters rarely talk about how absolutely disgusting their daily lives have become. People are generally much more concerned about their daily survival than worrying about how icky it is that they are literally surrounded by hundreds of dessicated corpses (walking and otherwise). When a character does point this out, you can usually safely assume that it will either be a women, or a stereotypically effeminate homosexual character. Often, a more macho character (sometimes this is just someone posturing, not unlike Stewart) will make a big show of how he’s not bothered by any of it.
This is probably a trope that can use some updating to bring it in line with modern sensibilities.