Yes, I think government has the right to say that men shouldn't marry men, women shouldn't marry women.
Sexual immorality used to have legal consequences. There was a time when having an affair was grounds for your husband/wife to divorce you and not owe you a thing.
The only thing left now to quit controlling is sex with children (which is a movement starting to pick up speed) and bestiality, although bestiality is legal in many areas. Everything else has been okayed.
How far should non-interferance by the government be taken into people's sexual affairs? I'd say it's been taken away too much already.
Chrys