But very often it comes out that the man needs the space because another woman is occupying it. I have friends in the profession who've observed that men will often not decamp unless there is another nest awaiting them. It's too terrifying to live alone, snapping open the TV dinners by yourself. The reason is women tend to have closer ties to their family, to their own children and a wider network of friends. Men put more of their eggs in the same basket.
Male widows have a much harder time adjusting to the death of a spouse.
I'm astonished that more people can't see that. We don't want to think that women are promiscuous. Men are scared to death of this. Little boys get shaped by Odysseus, Captain Kirk, Batman and most rock bands. The impetus is to prowl for adventures, not mortgages.