Couples will sometimes fight over who sleeps in more. And according to a study, it turns out your wife should be the one sleeping in, not you. The study examined 210 middle aged men and women, and found that women suffered greater health issues from lack of sleep than men.

“We found that for women, poor sleep is strongly associated with high levels of psychological distress and greater feelings of hostility, depression, and anger. In contrast, these feelings were not associated with the same degree of sleep disruption in men.”

He continues, “The more of your brain you use during the day, the more of it that needs to recover and, consequently, the more sleep you need. Women tend to multi-task … and so, they use more of their actual brain than men do. Because of that, their sleep need is greater.”

But why do women need more sleep than men?

“This is because women’s brains are wired differently from men’s and are more complex, so their sleep need will be slightly greater. The average is 20 minutes more, but some women may need slightly more or less than this.”

In other words: Let her sleep in, gentleman. It’s important.