How come my brother has never cheated on his wife?

Why do you believe that men have to cheat? My dad never cheated on my mom, my husband has not cheated on me, my brother never cheated on his wife. Neither grandfather cheater either. Cheating is not the normal thing to do. People can be monogomous -if they try to be. you need to respect the person you are with enough to not want to cheat on them. Even if they piss you off or something you think might be better comes along.