Presumably, our whole society Christians and not have replaced the holy union of one man for one woman, with all manner of non-holy relationships, thus the militant homosexual community is demanding their "unions" regardless how temporary or open, be given the word AND meaning of marriage.
Sadly, the members of the faith community have gone along with easy divorce, pre-marital sexual relationships (not a brief relationship prior to marriage) either numerous partners or moving in with one another and even having children without bothering to get married, doesn't act like the term "marriage" means anything at all so why bother to object when sodomites want their unions sanctioned.
Amen!