2nd reason found to check woman's ring finger

Women whose index fingers are shorter than their ring fingers are more likely to engage in casual sex, a McMaster University psychologist claims.

Clark's findings are documented in an upcoming article in the journal Evolution and Human Behavior.

While arguing the ring-index ratio is valuable as an indicator of the role of prenatal hormones on later development, researchers acknowledge it is not a perfect indicator of any individual's sexual inclinations. The complexity of the factors driving sexual behavior is indicated by the fact that none of Clark's factors relating to sexual activity were correlated with one another, showing a variety of biological and cultural pathways shape the behavior.

The strongest indicator of high sexual activity, of the seven Clark studied, was the amount of money spent on alcohol.