Originally Posted by JinnKai

You start saying things like "IMAGINE THAT!" and "You would do that, wouldn't you." Maybe even "That's so typical of you."

There are potential variations, including abuse, cheating, constantly traveling, miscommunicated desires, or even things you didn't know about your spouse before you married them. The last one is the most common, I think. People really don't ask "THOSE QUESTIONS" and get honest answers.