What all men do when they're cheating Shutterstock BY STACEY LAURA LLOYD@WRITERSTACEY Have you ever wondered if your man is cheating on you? While there are many different reasons and root causes behind why men cheat, including a lack of self-esteem, a search for validation, emotional and/or physical dissatisfaction, in addition to sheer lust or love for another person, an unfaithful partner can be devastating for any relationship. After all, if your goal is to have a healthy, successful, and long-lasting connection, being able to fully trust your partner is at the very heart of letting him into your heart. So if you suspect that he's cheating on you, it's important to look for these 13 clear-cut warning signs of an unfaithful man. Consider this your cheat sheet. He acts out of character Shutterstock You probably know your man backwards and forwards. You know how he acts when he's happy, when he's angry, when he's stressed, when he's tired, when h...