You may want to get your ruler out at this point. South Korean researchers have discovered that there's a link between finger length and the length of a man's penis.
The Gacheon University Gil Hospital team discovered that the ratio between the second and fourth digits on a man's right hand seems to correlate to the length of his 'flaccid and stretched' organ.
(Makes you wince, doesn't it? - but apparently they did that bit under anaesthetic.)
A lower index-to-ring finger length ratio indicates a longer penis, they found. But they note that the study was carried out only on Korean men, who apparently have slightly smaller todgers than other racial groups. The correlation might not apply elsewhere.
Other characteristics, such as sexual preference and even attractiveness, have also been linked in the past to finger length, which is established in the womb.
"During the fetal period, high concentrations of testosterone lead to high testicular activity, resulting in a lower digit ratio," says the team.
There's good news, though, for those with longer index fingers than ring fingers. According to a separate study from researchers in the UK, they're less likely to get prostate cancer.