Is it because you're unattractive? You're overweight? Underweight? You're not kinky enough in bed? You're boring in bed? You fuss too much? You complain too much? Find comfort in knowing that it's not your fault why your significant other keeps cheating. Even if you beautified yourself more, lost weight, gained weight, became a lioness in the bedroom, stopped fussing so much—if he is wired to cheat and lacks self-control, he's going to continue the behavior anyway. It's not you. It's him. Even if you're putting the gun in his hand (so to speak), it's his decision to pull the trigger.

"A man will be a man." "All men are dogs." "Men don't need a reason to cheat; all they need is an opportunity."

There are numerous sayings out there to explain why many men find it so difficult to be faithful to just one woman. If you have found yourself in the situation where your significant other has cheated on you, we as women often make the mistake of asking this question: "What am I doing wrong?" The truth of the matter is that a man holds complete responsibility for his decision to step outside of the relationship. However, some interesting findings about the male brain and his sexuality might shed some light as to why your husband or boyfriend seems to be a sex addict who just can't help himself.