The human person, made in the image and likeness of God, can hardly be adequately described by a reductionist reference to his or her sexual orientation. Every one living on the face of the earth has personal problems and difficulties, but challenges to growth, strengths, talents and gifts as well.
Today, the Church provides a badly needed context for the care of the human person when she refuses to consider the person as a "heterosexual" or a "homosexual" and insists that every person has a fundamental identity: the creature of God, and by grace, His child and heir to eternal life.
--The Congregation for the Doctrine of the Faith (CDF), Some Considerations Concerning the Response to Legislative Proposals on the Non-Discrimination of Homosexual Persons, July 23, 1992.
Male and female are adequate identifying characteristics of human persons. Sexual orientation is not.
Here are three CDF documents relevant to the discussion, must reads for anyone involved in "gay rights".
SOME CONSIDERATIONS CONCERNING THE RESPONSE TO LEGISLATIVE PROPOSALS ON THE NON-DISCRIMINATION OF HOMOSEXUAL PERSONS July 23, 1992