I think this is a great idea but it's hard to effect in practice. We have formalized relationships between significant others, including the obligations that co

I think this is a great idea but it's hard to effect in practice. We have formalized relationships between significant others, including the obligations that come with that. Less formalized relationships like friendships have less defined obligations, so it may be hard to negotiate who makes the effort of moving to bring the friends' residences in geographical proximity.