Sleeping on the left-hand side of the bed has proven to be 10 per cent more likely to give you a positive outlook on life, providing an 8 per cent surge in how likely it is you will love your job.
Neil Robinson, Sealy's top snooze analyst, said: "The research certainly highlights an interesting trend " could it be possible that the left side of bed is the 'right' side?
"For many co-habiting couples this may prove problematic " with each side of the bed a fiercely guarded territory, changing from right to left may not be that easy."
In probing the sleeping patterns of 1000 adults, the research found loners who prefer their own company prefer sleeping on the right and those with a large circle of friends plump for the left.
It also found that some couples never have to cross that bridge " as one in three head to separate beds every night.
Half those who usually share a bed head for the spare room to escape their other half's snoring and a quarter to get away from their restlessness.
One in ten are pushed out by their child or pet.