You suspect that your spouse might be fooling around, but how can you be sure?
With Gen. David Petraeus' recent scandal in mind, relationship expert Matt Titus stopped by "Dr. Drew" on Tuesday to talk about the warning signs that could point to a man's infidelity.
"The sexual frequency just plummets," he said. "There’s no more sex –- it declines, it’s not the same. He gets very jumpy around emails and cell phones...The mutual friends you have together, they start dissipating. They don’t want to be around you guys, they feel very, very uncomfortable."
Watch the video above for more on how to catch a cheater. Then, click through the slides below to see 13 American political figures who copped to having extra-marital affairs.