More than infidelity it is anger than ruin marriages. When you say something to your partner that is hurtful degrading and humiliating because you are angry remember no amount of apologising later can undo the damage especially if this happens too often. This is why controlling your anger in a relationship is crucial. Sometimes people who suffer from sudden anger outbursts know that it can be damaging for them but they are so helpless that they cannot do anything about it. They say or do things they know they will regret later. These people need help as anger becomes an