[quote=“BBC”]Finger length ‘key to aggression’
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.
Hand hints
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.[/quote]
Interesting. My fingers seem to be exactly the same length. I may be a woman. 
Should measure the finger length of keyboard commandos… wonder if the ‘not valid for verbal aggression’ stipulation holds.
Urodacus?