Youcat commented through CCC - Question n. 64 Part I.

YOUCAT Question n. 64 Part I. - Why did God create man male and female?

(Youcat answer) God, who is love and the archetype of community, created man male and female so that together they might be an image of his nature.       

A deepening through CCC

(CCC 369) Man and woman have been created, which is to say, willed by God: on the one hand, in perfect equality as human persons; on the other, in their respective beings as man and woman. "Being man" or "being woman" is a reality which is good and willed by God: man and woman possess an inalienable dignity which comes to them immediately from God their Creator (Cf. Gen 2:7, 22). Man and woman are both with one and the same dignity "in the image of God". In their "being-man" and "being-woman", they reflect the Creator's wisdom and goodness. (CCC 417) Adam and Eve transmitted to their descendants human nature wounded by their own first sin and hence deprived of original holiness and justice; this deprivation is called "original sin".    

Reflecting and meditating 

(Youcat comment) God made man in such a way that he is male or female and longs for fulfillment and completion in an encounter with the opposite sex. Men and women have absolutely the same dignity, but in the creative development of their masculinity and femininity they give expression to different aspects of God’s perfection. God is not male or female, but he has shown himself to be both fatherly (Lk 6:36) and motherly (Is 66:13). In the love of man and woman, especially in the community of marriage, in which man and woman become “one flesh” (Gen 2:24), people are privileged to sense something of the happiness of the union with God in which every man finds his ultimate wholeness. Just as God’s love is faithful, so also their love seeks to be faithful; and it is creative, as God is, because from marriage new life comes forth.    

(CCC Comment)

(CCC 370) In no way is God in man's image. He is neither man nor woman. God is pure spirit in which there is no place for the difference between the sexes. But the respective "perfections" of man and woman reflect something of the infinite perfection of God: those of a mother and those of a father and husband (Cf. Isa 49:14-15; 66: 13; Ps 131:2-3; Hos 11:1-4; Jer 3:4-19).     

(This question: Why did God create man male and female? is continued)