The smoke you smell is my little blonde brain processing this thought. 
Goddamnit gypped again. Long fingers, and the shorter index on both hands. It’s liked somebody raped my hands and gave me a short straw.
So… Where’s the equation correlating ratio to length ahem ?
Hmm. My fingers fit the OP ever so slightly, and my penis is largely unremarkable, for better or worse.
Here is another study which shows homosexuals, on average, have lager penises than heterosexuals: http://bit.ly/opNpy5
So if you are gay & have short index fingers, life can’t be all that bad, I suppose?