Finger length 'key to aggression'
Finger length is linked to testosterone exposure in the womb
The length of a man's fingers can reveal how physically aggressive he is, Canadian scientists have said.
The shorter the index finger is compared to the ring finger, the more boisterous he will be, University of Alberta researchers said.
But the same was not true for verbal aggression or hostile behaviours, they told the journal Biological Psychology after studying 300 people's fingers.
The trend is thought to be linked to testosterone exposure in the womb.
It has been known for some time that there is a direct correlation between finger lengths and the amount of the male sex hormone testosterone that a baby is exposed to in the womb.
In women, the two fingers are usually almost equal in length, as measured from the crease nearest the palm to the fingertip. In men, the ring finger tends to be much longer than the index.
Other studies looking at finger length ratio have suggested that, in men, a long ring finger and symmetrical hands are an indication of fertility, and that women are more likely to be fertile if they have a longer index finger.
Finger length can tell you a little bit about where personality comes from
Researcher Dr Peter Hurd
One study found boys with shorter ring fingers tended to be at greatest risk of a heart attack in early adulthood, which was linked to testosterone levels.
Comment: Now I have heard a woman or two mention the size of a man's hand and his feet. It seems that they have some theories on that as well. The rascals further speculate that there is a correlation between car color, sizes and types to these various appendages. What does this have to do with Rumsfeld and the size of our military? Nothing, absolutely nothing.