So let's say that you and your H have been married for a little over a year, and you are going on a big family vacation and staying in a big beach house. Unfortunately everyone else has kids and therefore gets their pick of the rooms, and being the only childless ones, you get last pick. You can choose:
a) Having a private bathroom but sleeping in twin beds that cannot be pushed together, and there's no room for an air mattress on the floor
b) Having a double (not king or queen!) bed, but sharing a bathroom.