Josh and Jennifer

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What's the number one reason men cheat? Ninety-two percent of men said it wasn't primarily about the sex. "The majority said it was an emotional disconnection, specifically a sense of feeling underappreciated. A lack of thoughtful gestures," Gary says. "Men are very emotional beings. They just don't look like that. Or they don't seem like that. Or they don't tell you that."

Josh says he cheated on his wife, Jennifer, because he felt underappreciated at home and started feeling insecure. "That insecurity was really the catalyst," he says. "I didn't feel comfortable going to the one person in the world I should be going to, which is my wife."

With daily worries like bills, children and chores, Gary says it's easy for couples to drift away from appreciating one another like they should. Gary says the other woman often makes the man feel better about himself. "[She] makes them feel different. Makes them feel appreciated, admired," he says. "Men look strong, look powerful and capable. But on the inside, they're insecure like everybody else. They're searching and looking for somebody to build them up to make them feel valued."