"Marriage implies procreation"
Says who? I mean I understand that's your OPINION, and that you'd LIKE to define it that way, but you're stating it like its fact and not subject to debate. In fact, by krellin's argument, it seems that after menopause we should just all get divorced? I think not. In fact, people have gotten married for a million different reasons over the course of history. "Procreation under God" is only ONE reason.
Here's what the online dictionary says. doesn't mention procreation in there anywhere.
1.
a.
the social institution under which a man and woman establish their decision to live as husband and wife by legal commitments, religious ceremonies, etc. Antonyms: separation.
b.
a similar institution involving partners of the same gender: gay marriage. Antonyms: separation.
2.
the state, condition, or relationship of being married; wedlock: a happy marriage. Synonyms: matrimony. Antonyms: single life, bachelorhood, spinsterhood, singleness; separation.
3.
the legal or religious ceremony that formalizes the decision of two people to live as a married couple, including the accompanying social festivities: to officiate at a marriage. Synonyms: nuptials, marriage ceremony, wedding. Antonyms: divorce, annulment.
4.
a relationship in which two people have pledged themselves to each other in the manner of a husband and wife, without legal sanction: trial marriage.
5.
any close or intimate association or union: the marriage of words and music in a hit song. Synonyms: blend, merger, unity, oneness; alliance, confederation. Antonyms: separation, division, disunion, schism.