[HarleyD]

This would also imply that simply experiencing a homosexual attraction is a deadly sin.

Gen 19:4 But before they lay down, the men of the city, [even] the men of Sodom, compassed the house round, both old and young, all the people from every quarter:
Gen 19:5 And they called unto Lot, and said unto him, Where [are] the men which came in to thee this night? bring them out unto us, that we may know them.

Were the men "homosexually attracted"? Yes. Was it a "deadly sin"? Yes.

I don’t know of any Christian tradition that teaches this.

I'd suggest reading the Bible instead of Vatican Position Papers.

[Tax-chick]

Why, I beg your pardon! Is that you, Rev. Phelps?

[Unassuaged]

“Gen 19:4 But before they lay down, the men of the city, [even] the men of Sodom, compassed the house round, both old and young, all the people from every quarter:
Gen 19:5 And they called unto Lot, and said unto him, Where [are] the men which came in to thee this night? bring them out unto us, that we may know them.”

A rereading of this story does suggest that maybe the men were spies for the attacking army.

[CholeraJoe]

Leviticus uses the same term for homosexuality as it does for the consumption of shellfish - abomination. Does that mean eating a shrimp cocktail is a deadly sin?

[dangus]

Sodom tells of the story of homosexuals demanding to rape visitors. You really think the deadly sin was in their sexual orientation? They were RAPISTS, Harley! Homosexual tendencies are a concupiscence; a temptation towards grave evil, one that makes the sufferer a terrible choice for the priesthood. But “sin” describes an action, not a temptation.