I keep saying: if I can find suitable candidates for a Heinlein Line Marriage, I'd be all for it.
You are right Fras. But take heart: if things keep going the way they are (i.e. most families needing both parents to work to get by), financially many folks will have no choice but to start living with their extended family again. Its already like that in places like Japan (very expensive, esp in cities), tho there are cultural reasons for that also. Many kids here are living with their parents into their late 20s+ for the same reason as well. They simply can't afford to live out on their own, with all their school debt, and no way to buy their own home.