Well, I don’t know about not in human history. There are hints that it was going on in the antediluvian world in Matthew 24:38, and of course in Sodom and Gomorrah.
There’s also Canada’s actual experience. After giving in to the propaganda, after more than 8 years Canada has fewer than 100 such “couples” to show for it.
Actual genuine homos overwhelmingly don’t want faux marriage, and are only being bludgeoned into what political activity they do have by a handful loud mouth activists.
The participation rate in the actual Sodom reached a startling height. It’s almost as if it were required by the local law, not just allowed. Not even Abraham’s arithmetic prevailed.
It was not “marriage”.