Questions of fidelity and sexism

I was just over at Five Thirty Eight.com and saw this banner ad on the site for sodahead.com. It asks, "Who's more likely to cheat: Obama or McCain?"

Seeing this ad just struck me in so many ways. First, they depict both wives as nutty, crazy, and angry. Thus the subtext to the question "Who's more likley to cheat?" and the banner is, "Which one of these women looks like a crazier bitch that would drive her man to cheat?" Second, why are people really voting on things like this when they should be registering to vote on November 4?

By the way, this is kind of a moot question since McCain cheated on his first wife when he met Cindy. And there have also been questions of his fidelity to Cindy earlier in the year.