http://www.livescience.com/49883-finger-length-in-men.html

Men, take a look at your right hand. Is your index finger shorter than your ring finger?

The ratio of these digits’ lengths could hint at everything from personality to intellect to physiology, a number of studies suggest.

Men with short index fingers and long ring fingers tend to be nicer toward women, according to a new study, to be published in the March issue of the journal Personality and Individual Differences. The finding could be a result of sex hormone exposure in the womb, scientists say.

And studies have also linked this ratio to a host of other qualities.

Penis size

A smaller 2D:4D ratio has been linked to a longer stretched penis size, according to a 2011 study published in the Journal of Andrology.

Facial attractiveness

Men who have a shorter index finger than ring finger may also have more handsome faces, suggests a 2011 study published in the journal Proceedings of the Royal Society B.