A sociological observation would be to ask, "What would occur if everyone was homosexual?"
The answer of course is our species would become extinct within a generation.
Name one person who believes a mare can have a penis, or a stallion can give birth to a foal. There are things that just are true, which is why it was taught when I majored in Biology in the 70s.
Show me evidence any stallion allows another stallion to give it up his rear, let alone LIKES it!
I particularly appreciate your question. “What would occur if everyone was a homosexual?”
We can use a version of that question to help others who are not “Christian” understand the problem with moral relativity, by asking “What would happen if everybody did that”?
Words to use? “Cheat, Lie, Steal, Rape, etc.” Maybe they would realize that we no longer can trust anyone, no longer have a safe neighborhood, honest politicians, pastors, doctors, banks, finanical markets, businesses, etc...
I am a Christian, but have always wondered how to respo0nd to those who would call me “judgmental” because I find certain behaviors, like having children outside of committed marriage, socially destructive.
Rant over - thanks for putting up with my digressing..