Hmm!! I must be psychic because this thought was rolling around in my head during my daily drive to work this morning.
Now, Svengali is a devout athiest and I regard all churches as nothing more than cults with huge followings which use superstition to try to control people. However, "marriage" as an institution, like it or not, has its roots (no pun) in religion and if you want a church wedding, as opposed to a civil ceremony, it must be conducted according to the rules of the church. Those rules, for just about all mainstream churches, recognise only the union of a man and a woman and, in many cases, the ceremony actually refers to "the procreation and raising of children".
That pretty well rules out any sort of same-sex pairing and it is very much a matter of their house, their rules. If the church's belief system does not recognise homosexuality as "normal", and most don't, then it is their right to refuse to bless such a union.
As for civil ceremonies - there we are dealing with acts of parliament which can be changed and, if Mr Brown and his greenies have their way, soon will be. If the people as a body do not approve they will have a chance to change the Government in a couple of years.
Opinions on this matter vary quite widely and I, for one, would be very interested to see the results of any reliable polling to see where Australians stand on the issue.