How could a man who has betrayed his partner before and never confessed, say he has the perfect relationship?

How could a man cheat on his long term girfriend, never confess....get engaaged and marry her, and now say his marriage is perfect!? He says he values truth and honesty, and that he values and respects his wife, but he is lying to her about his loyalty and continuously hiding from her major betrayals that he has subjected her to...How could he not see how flawed that is and what a farce of a marriage he truly has??? It makes me angry to see people do that to one another, and get away with it....