Over the course of 11 years, I have learned that the reasons people cheat are complicated, varied, and rarely what they first seem.
As a doctor with a quarter of a century of working with couples, I have a unique insight into what causes infidelity and betrayal. And what makes love work.
Surveys show that financial infidelity is common, even though six in 10 people think lying to your partner about money is as bad as or worse than cheating. But not every money secret is a relationship deal breaker.
"Our coaches are carefully selected to meet the needs of our community."
We often make judgments about how sexually faithful someone is based on that person's face.
Republican Representative Matt Gaetz threatened to release information about Michael Cohen's alleged infidelities later this week.
Americans who are at least 55 years old are having almost twice as much extramarital sex as they were 25 years ago.
The 22-year-old is alleged to have tortured and interrogated his girlfriend in a fit of jealous rage.
A court has struck down a decades-long ban intended to protect women from infidelity.