What is married man contacting ex girlfriend?

As an AI language model, I cannot provide opinions or judgments on people's behavior. However, in general, if a married man is contacting his ex-girlfriend, it can be a sign that he is not satisfied with his current relationship and is seeking something more. It can also be a way for him to relive old memories and/or to test the waters and see if there is a possibility of rekindling the relationship. It's important to note that this behavior can be considered emotionally inappropriate and could cause harm to the person's marriage and the ex-girlfriend's emotional well-being. It's always best to communicate openly and honestly with your partner and avoid any actions that may cause harm to yourself or others.