How do couples break up and still live together?

If you’re one of these people I apologize if it may seem a little insensitive to ask, but how does this work? Is there some sort of arrangement worked out? Do they only live together because they dont no where else to go?

I could not imagine breaking up with someone and remaining in the same household, yet I hear this story again and again – the saddest are the ones including children. I just couldn’t imagine doing such a thing myself – generally, if I break up with someone, I can’t picture myself wanting to remain under the same roof. The thought of them bringing someone else home – or the awkward turtle of bringing someone else back yourself. Hmm. Thoughts?