The Church has a feminine nature, that of a Bride, when found in relation to Christ, her Bridegroom. The Church has a feminine nature, that of a Mother, when found in relation to her children, the people of God. Yet the members of the Church are also the Body of Christ! Wait a minute, Christ is male, how can a female be the body of a man? How can a man be the member of a woman?
It has to do with relationships. The Church as a body represents a different reality than her parts. A man cannot be married to a breast or a uterus but to a woman. A man is not a father to a sperm cell or an eyelash but to a child. The relationship of Christ to His Church is a mystery expressed in the Sacrament of Matrimony. The relationship of the Three Persons of the Holy Trinity is also expressed in Matrimony, and likewise the priesthood can be expressed in these terms.
The Priest as Man, Husband, and Father.