In the United Kingdom, "the wrong side of the bed" is more often indicative of a woman's mood than a man's, according to a study done by the Sleep Council, an organization in the UK promoting better sleep habits. The study was timed to be released as Daylight Saving Time ended and most people had an extra hour's sleep over the weekend.
But it wasn't either men or women who fell into the largest group that woke up in the worst mood, the survey found. It was teenagers. – (HealthDayNews)