You say this so quickly after admitting to moral absolutes like sanctions against murder? Shame on you.
I am glad that you recognize the rights to life, liberty, and the pursuit of happiness only exist in a particular moral worldview. I'm sorry your exploration into the moral reality stops so short. Just because something is difficult to study doesn't mean you should not study it.
The moral laws on sexuality are also very universal and are based on heterosexual marriage as the proper expression of human sexuality. You might ponder that while you are pondering these issues at all.
Shalom.
I can only hope you're being facetious. If I engage in a behavior that harms you, that's immoral. If I engage in a behavior that harms me, but not you, that may be stupid but it's not immoral.
Can you honestly say you get the impression that I've not studied these topics?
The moral laws on sexuality are also very universal and are based on heterosexual marriage as the proper expression of human sexuality.
I believe that some people are in their very being, homosexual. Whether that's by nature or nurture I think is irrelevant. They are what they are and that trait is immutable. If someone whose nature is to find comfort and romance with someone of the same sex finds someone else similarly inclined, they are behaving according to their nature. To behave contrary to that would not be the "proper expression" of their sexuality.
You'll most certainly disagree with me, but I simply point this out to demonstrate that your way of thinking is far from universal.
From a biological/evolutionary perspective, if 2% of the population does not procreate, it would have little significance on the world.