Man's finger reveals all about his manhood

Sorry boys, but it does seem the size of your fingers is a pretty good guide to your manhood.

Long regarded as a myth and source of much amusement, scientists have now confirmed that the length of a man's index finger relative to his ring finger can reveal his penis size.

Korean scientists studied 144 men and discovered that the ratio between their second and fourth fingers - known as digit ratio - was directly linked to penile length.

While previous studies have indicated links between digit ratio and prostate cancer, none have revealed why men who undergo normal puberty have different penis sizes.

Each of the men who took part in the Korean study were all aged over 20 and had been admitted to hospital for urological surgery.

After having their height, weight and fingers measured the size of their flaccid and fully stretched penises were recorded while the men were under anaesthetic.

The scientists discovered that while each man's height, ring finger length and digit ratio were all associated with the size of his penis, the digit ratio was the sole "significant predictive factor" for stretched penile length.

Reporting their findings in the Asian Journal of Andrology, the scientists said the individual lengths of the ring and index fingers had nothing to with penis size.

"However the results ... did show that stretched penile length correlated with digit ratio, as men with a lower digit ratio tended to have a longer penile length," they wrote.

"This means that it is not finger length but digit ratio that can predict adult penile length."

Many researchers investigating various behavioural and physiological conditions have in the past examined links between digit ratio and hormone activity.

Some believe the digit ratio is a predictor of personality traits such as aggression.

The Korean scientists said that the ratio of the index and ring fingers was thought to be fixed early in development, in a similar way to how penile growth is influenced by a baby's exposure to testosterone while in the womb.

They said based on their findings, they believed that higher prenatal exposure to androgen hormones like testosterone could be responsible for both the lower digit ratio and longer penile length.

"Based on this evidence, we suggest that digit ratio can predict adult penile size and that the effects of prenatal testosterone may in part explain the differences in adult penile length," they wrote.

Source: smh.com.au

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