A THIRD of American adults sleep separately from their partners, according to the American Academy of Sleep Medicine.  The study gives a full breakdown on age and gender, and it may be no surprise to some of you that nearly half of all couples in a specific age group are “sleep divorced.”  While we discuss our sleep habits, don’t feel bad about yours if they involve solo sleeping:  the study reinforces that sleep divorces may actually help keep couples married in the long run.