RED FLAG #4: If your spouse no longer wants to have sex with you, you may be headed for divorce. Sex in an integral part of a healthy marriage. It provides a way to connect with your spouse on an emotional as well as physical level. Sex is good exercise and promotes healthy well-being. If your spouse no longer shows sexual interest in you, it is imperative to try to find out why and work on the issues. Often lack of sex leads one spouse to resent the other spouse over time.