>> We are not to excuse sin and we are to call it what it is-our depraved nature. <<
No Catholic is arguing that gay sex should be excused. But can’t you understand that a homosexual inclination is a temptation, whereas homosexual sex is an action? If someone doesn’t act on a temptation, it is not a sin.
One does not have to act upon their lusts to sin:
There is something in my post that is a bit unclear. While sin exists in all of us, there are degrees of sin. All sin is sin to God and we are all condemn by it unless we turn to Christ and repent. This is what I would, for now, state as general sin. But there are degrees of sin by which our sinning begets other sin which begets other sin.
According to the catechism posted earlier, homosexuality is treated like everything else that one can master and arrest. When I linked it to lying I was thinking in terms of general sin. However, homosexuality as explained in the bible is a sin of severe degree. It isn't something that people are tempted to do like lying. It is something God has given them over to unless His grace so shines on them. People don't arrest homosexual urges. It is depravity at one of it's highest form.