My position (as I have said on some of marantha's other threads) is that I agree with marantha on this cohabitation thing.
I think the problem on MN is that most people are coming at the situation from the position of cohabiting parents with children, and naturally see that this rule would benefit them.
However not everyone who cohabits is in a stable partnership with children. I don't even know if the majority of cohabiting relationships are like that.
A vast number of people are randomly shacked up with people who they think are OK, and who they have a laugh with, but who they aren't in a permanent relationship with. I lived with someone for a few years when I was younger, I would never have married him. I knew for years it wasn't right but didn't get rounf to kicking him out as we got on well. Under these rules we would have been tied togetehr as if married? I held assets, he would have got half of them? Even though he had contributed nothing and our relationship was never going to be forever?
It doesn't make sense. These things should be opt in not opt out. With these proposals people will end up tied to each other by accident, and then an awful lot of them will get a horrible shock when they split up. Where once someone quietly moved out and everyone proceeded as usual, now it will be lawyers and expense and unforeseen complications.
As things stand you can opt-in by marriage, others have suggested an additional civil partnership option (marriage with a different name). All fine. To legally tie people together when they have not indicated that that is what they wish is bizarre, and unfair on the (large?) proportion of people for whom protection is neither needed nor desirable.
So there you have it