I thought it worth noting that within ten days there were stories on the family bed (parents + kids sleeping together) and couples sleeping in separate but equal spaces (called dual master bedrooms).
After reading both, I'm left wondering if after kids maybe adults just get tired of sharing.
The article on couples sleeping separately makes a point of saying that sleeping arrangements have nothing to do with the amount of love between partners...which was my first assumption. Given I've only been married two years, I'll refrain from writing the separate room idea off completely for another decade...in the meantime, we'll stick to our full-size bed. I think if we ever buy a king, it just might feel the same as sleeping in another room.