Actually, it's not a fact. It is a claim made by a person who is not very intelligent.However, this still remains;
At the most basic essence, marriage is a cross cultural constraint on evolutionary mating behavior.
Ss couples are a defective complete failure of mating behavior, making ss marriage an oxymoron.
That's not judgment, that's fact.
a) Marriage is a legal contract to secure certain rights and protections.
b) Procreation is neither a prerequisite for, nor a requirement of legal marriage.
c) Infertile heterosexual couples are regularly allowed to legally marry.
You seem to have great difficulty in understanding what is factual. You certainly seem to have no clue what is rational.