Why do so many women in long-term relationships cheat—and often with men who seem like total losers?

In this video, I break down the science behind two popular theories about female infidelity: the Mate Switching Hypothesis and the Dual Mating Strategy. One of these is more “romantic.” The other is... well, it’s the one most men fear deep down.

We’ll look at the latest research—including a 2024 study co-authored by Macken Murphy—and how it lines up with what I’ve heard from thousands of men in sexless marriages or reeling from betrayal.

This is hard to hear. But if you want real answers, here they are.

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