Jennifer Huget in the Washington Post:
You’ve checked out your lover’s zodiac sign, and you know what her sleep number is. Before taking the next step, though, you might want to have a close look at her fingers.
A new study in a British medical journal finds a link between the relative length of a woman’s index and ring fingers and her athletic prowess. The research takes its place among dozens of other studies tying that ratio — known in finger-measurement circles as 2D:4D (the relationship between the length of the second digit, 2D, and the fourth) — to all manner of physical and psychological traits, from breast cancer risk to schizophrenia.
Digit ratio, as the measurement is called, has been found to relate to left-handedness and autism, to hyperactivity and bullying in children, eating disorders in women and depression in men.
More here.