this one shall be called ‘woman,’
-- Gn 2:18-25
God created man and woman together and willed each for the other. The Word of God gives us to understand this through various features of the sacred text. "It is not good that the man should be alone. I will make him a helper fit for him." None of the animals can be man's partner. The woman God "fashions" from the man's rib and brings to him elicits on the man's part a cry of wonder, an exclamation of love and communion: "This at last is bone of my bones and flesh of my flesh." Man discovers woman as another "I", sharing the same humanity.
-- CCC 371
The virtue of chastity blossoms in friendship. It shows the disciple how to follow and imitate him who has chosen us as his friends, who has given himself totally to us and allows us to participate in his divine estate. Chastity is a promise of immortality. Chastity is expressed notably in friendship with one's neighbor. Whether it develops between persons of the same or opposite sex, friendship represents a great good for all. It leads to spiritual communion.
-- CCC 2347