Sorry to come across as so apparently dismissive, but my honest reaction to this thread both before and after reading it is the same.

I see marriage as a token of commitment.

It is in my view a way for prospective parents to show respect, via a solemn ceremony, for the importance of ensuring that their future children are not left alone and disadvantaged in life.

The priest says: "so you fancy each other eh? well it's time to face up to what you're getting yourself into, and if you're not ready, it's time to back out. If you are ready then make your vows and stick by each other through thick and thin cos children deserve the best."

Contraception has made it possible to have sex before marriage responsibly.

The modern world has turned marriage into a token of romantic attachment.

And gay people have a right to enjoy that indulgence as much as straight people do.