People whose ring finger is longer than their index digit tend to drink more alcohol, new research shows. But why is this so?
The answer lies in our understanding of sex differences. Some sex differences are influenced by social factors, but others have their roots in our biology.
There are marked differences between how much alcohol men and women drink, with men consuming far more. The reason for this and many other sex differences can be found in our exposure to sex hormones (testosterone and oestrogen) in the womb.
