Different how? The major issue with civil partnerships was only same sex couples could enter them (no pun intended)
Can't be arsed to read it all ... to summarise first part of OP ... Milk is gay? Not sure it needed a whole thread tbh ..
You don't have to be gay to have a civil partnership anymore, but it's not necessarily recognised in some places, where marriage would be. You also can't use adultery as a way of getting out of it, for some reason. No idea what the thinking behind that was. The title is an intentional difference, too.
...a number on a list ... nobody knows it but I'm always there ... statistical reminder, although shorter to be fair