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St. Pius V
That horrible crime, on account of which corrupt and obscene cities were destroyed by fire through divine condemnation, causes us most bitter sorrow and shocks our mind, impelling us to repress such a crime with the greatest possible zeal.
Quite opportunely the Fifth Lateran Council [1512-1517] issued this decree: "Let any member of the clergy caught in that vice against nature, given that the wrath of God falls over the sons of perfidy, be removed from the clerical order or forced to do penance in a monastery" (chap. 4, X, V, 31).
So that the contagion of such a grave offense may not advance with greater audacity by taking advantage of impunity, which is the greatest incitement to sin, and so as to more severely punish the clerics who are guilty of this nefarious crime and who are not frightened by the death of their souls, we determine that they should be handed over to the severity of the secular authority, which enforces civil law.
Therefore, wishing to pursue with greater rigor than we have exerted since the beginning of our pontificate, we establish that any priest or member of the clergy, either secular or regular, who commits such an execrable crime, by force of the present law be deprived of every clerical privilege, of every post, dignity and ecclesiastical benefit, and having been degraded by an ecclesiastical judge, let him be immediately delivered to the secular authority to be put to death, as mandated by law as the fitting punishment for laymen who have sunk into this abyss.

http://www.traditioninaction.org/religious/n009rp_ɧoɱosɛҳųαƖPriests.htm

I had direct experience dealing with Tetherow over several years.  In fact, I am the only one foolish enough to have defended this man in the public forum with credible arguments, a defense which I have publically apologized for because the arguments were proven to be entirely grounded upon lies, half-truths, and factual distortions provided by Tetherow.  Despite my public apology, Tetherow still passes the defense around.  If Tetherow wants to defend his name in this post or any other internet forum, I welcome the opportunity to confront him with his own record for the purpose of offering a charitable warning to other Catholics.  At any other time in the Church history Tetherow would never be permitted to be involved in pastoral care again.  At best he would be restricted to a monastery for a life of supervised penitence, and at worse, a life in clerical prison if he escaped burning at the stake...

Saint Catherine of Siena, a religious mystic of the 14th century, relays words of Our Lord Jesus Christ about the vice against nature, which contaminated part of the clergy in her time. Referring to sacred ministers, He says: “They not only fail from resisting this frailty [of fallen human nature] … but do even worse as they commit the cursed sin against nature. Like the blind and stupid, having dimmed the light of their understanding, they do not recognize the disease and misery in which they find themselves. For this not only causes Me nausea, but displeases even the demons themselves, whom these miserable creatures have chosen as their lords. For Me, this sin against nature is so abominable that, for it alone, five cities were submersed, by virtue of the judgment of My Divine Justice, which could no longer bear them…. It is disagreeable to the demons, not because evil displeases them and they find pleasure in good, but because their nature is angelic and thus is repulsed upon seeing such an enormous sin being committed. It is true that it is the demon who hits the sinner with the poisoned arrow of lust, but when a man carries out such a sinful act, the demon leaves.” (St. Catherine of Siena, El diálogo, in Obras de Santa Catarina de Siena (Madrid: BAC, 1991), p. 292)