On a subject which is SO controversial, in some respects, I think the Catechism of the Catholic Church falls short of providing practical guidance.
consider
1735 Imputability and responsibility for an action can be diminished or even nullified by ignorance, inadvertence, duress, fear, habit, inordinate attachments, and other psychological or social factors.
This is a broad piece of advice, and I can’t see why it wouldn’t apply to the acting out of a person’s homosexuality, as follows,
It’s clear stated and understood that homosexual conduct is forbidden by the Bible, but the above-quoted paragraph seems to say that a person may not be GUILTY of that sin (or other “grave” conduct, like lying, stealing, or whatever) because of these other factors.
This paragraph does not deny the objective moral depravity of homosexuality, but it seems to say that a lot of sins are not necessarily to be imputed to a person, for the reasons vaguely stated above.
and , read on:
1860 Unintentional ignorance can diminish or even remove the imputability of a grave offense. But no one is deemed to be ignorant of the principles of the moral law, which are written in the conscience of every man. The promptings of feelings and passions can also diminish the voluntary and free character of the offense, as can external pressures or pathological disorders. Sin committed through malice, by deliberate choice of evil, is the gravest.
2357 Homosexuality refers to relations between men or between women who experience an exclusive or predominant sexual attraction toward persons of the same sex. It has taken a great variety of forms through the centuries and in different cultures. Its psychological genesis remains largely unexplained. Basing itself on Sacred Scripture, which presents homosexual acts as acts of grave depravity, tradition has always declared that “homosexual acts are intrinsically disordered.” They are contrary to the natural law. They close the sexual act to the gift of life. They do not proceed from a genuine affective and sexual complementarity. Under no circumstances can they be approved.
**2358 The number of men and women who have deep-seated homosexual tendencies is not negligible. This inclination, which is objectively disordered, constitutes for most of them a trial. They must be accepted with respect, compassion, and sensitivity. Every sign of unjust discrimination in their regard should be avoided. These persons are called to fulfill God’s will in their lives and, if they are Christians, to unite to the sacrifice of the Lord’s Cross the difficulties they may encounter from their condition.
2359 Homosexual persons are called to chastity. By the virtues of self-mastery that teach them inner freedom, at times by the support of disinterested friendship, by prayer and sacramental grace, they can and should gradually and resolutely approach Christian perfection.**
So, the church acknowledges that homosexuality is a psychological disorder, so it must be applicable to paragraph 1735, quoted above. No? Why talk about psychological disorders in the first place? I think that homosexuality is the ONLY psychological disorder mentioned in the Catechism. IF Paragraph 1735 does not apply to homosexuality, then words have lost their ordinary meaning.