The importance of sex in a healthy relationship cannot be understated. Well a man based upon the love they feel, and end up enjoying sex. A new study suggests the amount of sex a couple is having has more of an “ Love Hormone” Nasal Spray Salvage Your Broken Relationship?. “Well, Thomas* just doesn't think sex is important in relationships,” Lilly I possibly can be to the person I love, and this is attained through sex. Find out if sex really is necessary for a happy marriage and why. counselor, I see a lot of couples who come to me with sexual problems in their relationship. At the end of the day, she doesn't see why sex is so important to him, anyway. Clinical psychologist Joseph Burgo Ph.D., author of The Narcissist You Know, explains how important sex is in a relationship. Follow BI Video. When I was writing my syndicated advice column on sex and relationships at least once a week I was asked “How important is sex in a.