Do you think most people know homosexuality is perverted and sinful?
We all sin, but I read sexual sin is especially defiling and shameful.
Sexual sin is defiling, because it one of the only types of sins that directly has a part in not only harming another, but yourself.
Killing is directed outward from within.
Stealing is directed outward from within.
Lying is directed outward from within.
Dishonoring your parents is directed outward from within.
Coveting is directed outward from within.
Adultery is directed
outwardly, and inwardly - coming from within.
Lusting after another person is directed
outwardly, and inwardly - coming from within.
Those sins that specifically work to feed personal sensations (witchcraft and divination, eating unclean but tasty things not considered food, sexual sins...) are bidirectional, and are usually considered abominable, because they are plain nasty, dishonerable to the body or God, and usually work to serve self.
The defiling and abominable nature of some sin, however, is a commentary on the moral consequences it brings. But, lying about Santa sends you to the same "place" as it does a murderer. A sin is a sin to God.