13 facts about cheating that couples - and singles - should know

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Infidelity is murky territory.

• Infidelity means different things to different people
• Psychologists and relationship experts have spent years studying the science of infidelity
• Some of their most compelling findings are below - but remember, they aren't predictions of the future

Infidelity is murky territory. Does a one-night stand at a bachelor party count? How about an emotional entanglement with a close friend that doesn't involve anything physical?

Psychologists and relationship experts have spent years studying the science of infidelity, turning up surprising insights into what different couples consider cheating, how they react to cheating, and how they bounce back after someone strays.

We looked into some of that research and pulled out the most compelling results. Read on to see what we found - and how you can apply these findings to your own relationship.