Sorry, Mr. Johnson, Jr., but this is what's going to happen: The marriage license will say "Spouse A" and "Spouse B." The officiant will sometimes say "Do you take this man to be your lawfully wedded husband?" or "Do you take this woman to be your lawfully wedded wife?" Children will still have mothers and fathers, although in some cases they will have two of one rather than one of each. (And children seem to adapt to things like that much more easily than Fox News "legal analysts.") Nothing will happen to heterosexual marriage that wasn't going to happen anyway. Society doesn't come to a screeching halt because the state changes the wording on a marriage license.
And if I may make a suggestion, stay away from anthropology and questions of language and culture. You're obviously way out of your depth.
And just to demonstrate that even in Illinois we have our own home-grown screwballs, how's this?
David E. Smith, IFI executive director, told the Daily Herald that he hoped state legislators would be "a little gun-shy of going forward with another social experiment" in legalizing same-sex marriage.
Smith added to the Post-Dispatch that he fears the goal of those pushing for marriage equality, "for some, is the eradication of marriage altogether"[.]
You see, the way to get rid of marriage is to allow a whole new group of people to get married. Obvious, now that he's pointed it out to us.