Think the polygamists are feeling left out of this wildly widening definition of marriage?
Libs try to dismiss your argument as a false “slippery slope” argument.
It is in no way a slope, or a continuum, of acceptable arrangements.
There is traditional marriage, defined by God from the very beginning of the human race, then there is everything else.
Once THE definition is compromised, no logical argument can be made for another definition that excludes ANYTHING.