It seems that the amount of prenatal testosterone that a person gets in the first trimester influences a laundry list of physical and mental characteristics, including sexual orientation, athletic ability, possibly autism, and (most importantly for this line of questioning), relative finger length. As well as a man’s penis length and chance of getting prostate cancer.

Isn’t science wonderful? Now you can tell how large a guy’s privates are likely to be just by comparing his fingers. Once word gets around — and you know it will — I can imagine ladies making sure they check out their dates’ hands first thing, and guys flaunting (or hiding) them depending on what they say. And ladies, it’s easier than trying to inconspicuously look at his feet. 😉