Once a cheater, always a cheater?
Yes, according to sociologist Eric Anderson. The author of "The Monogamy Gap: Men, Love and the Reality of Cheating" stopped by HuffPost Live on Monday and told host Caitlyn Becker that the oft-quoted refrain holds true.
"The 'once a cheater, always a cheater' is just part of the biological drive that men have," Anderson said. "The number one reason men don't cheat is because they can't cheat. And what I mean by this is, the more men have the opportunity to cheat, the more they will. The better looking they are, the more they will."
Anderson said that the same applies to women, and while people may cheat less often as they grow older, the drive toward infidelity remains.
"We might grow out of the frequency of cheating but when one has the opportunity, its often taken," he said.
Check out the clip above for more on Anderson's take (and watch the full HuffPost Live clip here), then click through the slideshow below to see what celebrities have said about cheating.