My perception is that it's a free country and everyone can do whatever they want.
But at the same time I don't think it should be forced down anybodies throat who disagrees either. (examples being mutli gender bathrooms and the similar.)
If anyone should be accused of forcing something down anybody's throat, it's someone dictating to others who they are allowed to marry. And not sure what multi gender bathrooms have to do with same sex marriage either? One of the key reasons the right to marry is so important, is the number of benefits that married couples get that cohabiters/civil partnerships do not (at least in many parts of the world anyway). Marriage, in my humble opinion, is an outdated custom, but the benefits enshrined in law that accompany it, mean that it still has great financial significance. Not my place to tell anyone how they should think and/or act, so I tend not to do it, shame more people don't feel the same.