WELL it is not that simple, people cheat for different reasons, But i do believe if there is a problem in your relationship, people should talk about it, than rather resulting to cheating or seeking comfort else where,
That saying once a cheater always a cheater is a pile of bullshit, I know soo many who have cheated on their partners, been dumped and learned from their mistakes and vow never do that again to themselves or the people they love
YOUR PAST IS NOT YOUR POTENTIAL - REMEMBER THAT PEOPLE - AND EVERYONE MAKES MISTAKES, BUT YOUR MISTAKE - Does NOT defined who you are, what the defined's you is how high you rise after falling