Our society is experiencing more role sharing, in part by choice and in part from necessity. As more spouses work outside the home, the in-home tasks need to be done by both. These are the intangible roles we all play for each other. Some are specific to gender. There can only be one mother and one father.
Husbands are intrinsically different from wives.
Each couple constructs are a unique way of being. They are the soul of marriage. They make every relationship unique. Everyone has a lifestyle. While we all have some similarities in the ways we express our lifestyles, we also have many differences.