From the Daily Mail (UK):
Dr Alias's research, which focused on medical students in the United States, showed that 45 per cent of male doctors in training were "very hairy", compared with less than 10 per cent of men overall. In a region of southern India, research among medical and engineering students and manual labourers found that both groups of students had more body hair on average than the manual workers.
Further investigations showed that when academic ranking among students was examined, the hairier men got better grades. Taking this study one step further, Dr Alias studied 117 Mensa members (who have an IQ of at least 140) and found that this group tended to have thick body hair. Some of the most intelligent men were those with hair on their backs as well as on their chests.