His research amongst medical students in America found that 45 per cent of male trainee doctors were "very hairy", compared with less than 10 per cent of men generally.
In Kerala, southern India, research among medical and engineering students and manual labourers showed that both groups of students had more body hair on average than manual workers.
Tom Jones has long been a symbol of raunchiness, tight trousers and Cuban heels.
But, according to new research, his excessive body hair could also mean he has high intelligence.
Although the terms hirsutism and hypertrichosis often are used interchangeably, hypertrichosis actually refers to excess hair (terminal or vellus) in areas that are not predominantly androgen dependent.