Amongst supposedly monogamous couples, 23% of men and 19% of women have cheated on their current partner, and while studies have long found that men are more likely to cheat than women, that gap has significantly narrowed over time; in fact, married women between the ages of 18 and 29 cheat at a slightly higher rate than men do.

Behind cold bits of data like this are the many real stories of infidelity and the heartache and destruction they create. If you're not yet part of the cohort who's experienced the fallout of cheating firsthand, you probably want to avoid joining its ranks. Well, my guest has a formula that explains what three factors add up to infidelity, and once you know it, you can reverse engineer things to prevent those factors from showing up in your relationship.

His name is Andrew G. Marshall and he's a marriage therapist with over 30 years of counseling experience. Today on the show, Andrew first shares the breakdown in age and gender amongst the clients who come to see him in his practice and the two stages of life where he's found infidelity to be the most common. Andrew shares his formula for what leads to infidelity, and as we unpack its elements, we discuss how quiet desperation is a major driver of cheating, why men who don't have good male friends are more likely to have an affair, how to know if you're forming an inappropriate friendship that could lead to infidelity, Andrew's seven deadly sins of bad communication, and more. We also talk about the practices that healthy couples use to ward off infidelity, and the best question to ask yourself to start improving your relationship today.

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