Another interesting correlation has, though, been discovered by Jaroslav Flegr of Charles University in Prague.

ECONOMIST: Toxoplasmosis and psychology

"Axillary odour from women in the follicular phase was rated as the most attractive and least intense, " the study's leader Dr Jan Havlicek, from Charles University in Prague, Czech Republic, said.

BBC: NEWS | Health | Woman's scent can lure or repel

And a piece of evidence that this is exactly what happens emerged this week from a research group led by Jan Havlicek of Charles University, in Prague.

ECONOMIST: Odour and mating preferences