Sharing a bed saps men's brain power.

I always suspected this was the case. Interesting stuff.

Sharing a bed with someone could temporarily reduce your brain power - at least if you are a man - Austrian scientists suggest.

When men spend the night with a bed mate their sleep is disturbed, whether they make love or not, and this impairs their mental ability the next day. The lack of sleep also increases a man's stress hormone levels.

According to the New Scientist study, women who share a bed fare better because they sleep more deeply.

[...] Dr Neil Stanley, a sleep expert at the University of Surrey, said: "It's not surprising that people are disturbed by sleeping together.

"Historically, we have never been meant to sleep in the same bed as each other. It is a bizarre thing to do.

"Sleep is the most selfish thing you can do and it's vital for good physical and mental health. Sharing the bed space with someone who is making noises and who you have to fight with for the duvet is not sensible."