Question:
Answer:
Well, it depends on what you mean by desire and what you are desiring. The fact that one is attracted to a sexual act that is sinful (and both adultery and sodomy are sinful) is not itself a sin, since being tempted is not a sin.
If by “desire” you mean a deliberate enjoyment of the thought of doing something sinful, then both homosexual desires and any other sexual desires that are not for one’s legitimate spouse would be sinful. This is what Our Lord teaches in the Sermon on the Mount. But if by “desire” you mean simply the feeling accompanying temptation, then this is no sin, or at most a venial sin as long as you are not encouraging it.
I think your confusion might come from the fact that we often today emphasize that the mere fact of having a homosexual inclination does not mean that the person with this inclination has sinned. They are just being tempted, perhaps, as can be anyone else. All sinful inclinations are disordered since they are against reason guided by faith. There is no harder standard for one person than another. All of us must obey the law of Christ in our thoughts and deeds.