it's one thing to want space and not have someone draped all over you all of the time, but to live in a completely separate house... what's the point of being married? Separate room and bathroom? Cool. Separate house? Nau.
There's a reason a lot of these entertainment industry females aren't married. They don't want to be married as much as they want the ceremony of marriage and the nice pretty ring that comes from it. A lot of them want the title of being able to say "I'm married" while showing off their shiny rock but to live as a married woman is just too constricting in their minds.