Since one of the major indicators of an unfaithful man is changes in his behavior, this is even more apparent when it comes to his focus on his appearance. Since you know how your man typically behaves in many situations and have clear insight into the different nuances of his personality, any deviations from this norm should be a wake-up call that he may be unfaithful. You may even notice subtler changes, such as when and where he charges his phone, the amount of time he spends in the bathroom, and an increased length in his commute to and from work. Or maybe he used to look forward to hosting dinner parties and game nights at your place, but now he doesn't want people coming over. For instance, perhaps he'd always be glued to the television during football games refusing to miss a play, but now he's off in the other room with the door closed. However, one of the defining characteristics of a cheating man is that he acts out of character, and his once typical and predictable behaviors, actions, and routines start to switch. You know how he acts when he's happy, when he's angry, when he's stressed, when he's tired, when he's bored, and even when he's hungry. You probably know your man backwards and forwards.