Norway is home to some of Europe's dirtiest people, according to a survey. The study found seven per cent of people in Norway changed their underwear only once a week. The survey, conducted by AC Nielsen for Norwegian underwear maker Dovre, asked 1,000 Norwegians between the ages of 20 and 60 how often their changed their underwear. Some people admitted to changing them even less often than once a week. More than a third said they wore the same underwear for two days or more, Aftenposten reported. People between 41 and 50 were the least likely to change their underwear...