If you want to know more about the behavior of a man you do not know well, just take a look at his hands. According to a McGill University study in Canada, a man's hands tell more than you might have thought.

According to this study, if the ring finger is longer than the index finger, then the male is kind and cautious. If the ring finger of that index is of equal length, then the male is rude and stubborn.

Other studies have shown that the ring finger is affected by hormones in the womb. When the ring finger is short, it means it is affected by male hormones. This results in more rude behavior of boys and men towards women and girls.

This McGill University study is published in the journal Personality and Individual Differences.