A "husband" is a person of male gender who has committed (in every sense of the word) to love, honor and care for a specific female for the remainder of his life. A "wife" is the counterpart of the "husband" and has also committed (in every sense of the word) to love, honor and care for a specific male for the rest of her life.
Is that clear or do you have questions?
You know it really isn't that hard, unless you have a bad case of liberalitis.