A happier wife may bring better sleep for husbands.
According to the American Academy of Sleep Medicine, married couples are more likely to sleep in sync when a wife is more satisfied with her marriage.
The study indicates that partners who sleep in the same bed are awake, or asleep, at the same time for 75 percent of the time – but it also suggests that the percentage is higher if the wife has a higher level of marital satisfaction.
"Most of what is known about sleep comes from studying it at the individual level; however, for most adults, sleep is a shared behavior between bed partners," said Heather Gunn, lead author of the study.
"This suggests that our sleep patterns are regulated not only by when we sleep, but also by with whom we sleep."