For many of us, bedtime routines and sleep preferences can be a point of contention in our relationships. One in three Americans report that their partner negatively affects their sleep. For light sleepers, the slightest movement or adjustment in the middle of the night makes for disruptive sleep. Or maybe it’s the blanket hogging that has you lying wide awake — coverless, cold and frustrated.If you’re at your breaking point but don’t want to end up in a sleep divorce, try the Scandinavian sleep method. This solution may drastically improve your and…