It seems to me we've rid ourselves of any vestige of the idea that sex has a purpose beyond pleasure, that sex, love, marriage, and procreation are designed to be intertwined, and that some sexual desires are perverse as desires because they are inherently disordered. I was once read a case where a judge banned a teenager from owning pets because the boy had had sex with his dog, but the judge's ludicrous reasoning was that it might have been uncomfortable to the dog (again, consent issues), not that sex with animals is immoral. Even pedophilia is only considered problematic because of age of consent issues, not because it is perverse to lust after children. Sodomy, three-or-more-somes, prostitution, pornography, sado-masochism, and basically whatever bizarre fetish you can think of are all treated as matters of, "We're consenting adults, we're not hurting anyone, who are you to judge?" You have to hurt someone against their will to be considered immoral. Basically we've gotten rid of the 6th and treated all things sexual under the 5th.
Actually, I think the problem is that we are still unwinding the excessive criminality of particular moral taboos. That's not to say that some immoral things shouldn't also be illegal. Along the way, when a particular action is decriminalized, people can't agree what that means culturally.
Watching the currently trendy "nostalgic" TV shows, set in recent earlier eras (before cell phones, the
deus ex machina that stifles dramatic tension), the moral preachiness that one encounters, particularly with regard to homosexuality, can be tedious. Personally, I DO sympathize with closeted characters on
Endeavour or
Inspector Gently, who don't just face public shaming for acting on their forbidden sexual preferences, but jail time (or should I write that "gaol"

). These situations were unjust.
The bottom line is that one can respectfully believe that a man shouldn't go to jail for consensual sodomy, while still believing that it is a sin. I've made similar arguments about abortion here. Just because abortion isn't outlawed doesn't mean we can't argue against exercising that "choice" in the culture.
Sterling Spatz