Men and women fared differently. While men thought they slept better with a partner, and women believed they didn't, actually both sexes had more disturbed sleep, even when they did not have sex. Lack of sleep led to increased stress hormone levels in men, and reduced their ability to perform simple cognitive tests the next day.
However, the women apparently slept more deeply when they did sleep, since they claimed to be more refreshed than their sleep time suggested. Their stress levels and mental scores did not suffer to the same extent.
[New Scientist, 22 July 2006]
Poor cognitive skills may mean faulty decision-making and poor understanding of problems and tasks ahead.
What does this mean?
Should married men spend the night on a separate bed?
My quick tip: Marry someone who seldom move in bed when she's asleep. *LOL*