A study that used data from two archival samples to tested the hypothesis that light-eyed people are more likely to abuse alcohol. The first sample had 10,860 Caucasian male prison inmates and sample two consisted of 1,862 Caucasian women.
Both samples proved to show that people with light eyes, or blue eyes more specifically, had consumed a considerable more amount of alcohol than those with dark eyes. Previous studies have shown that dark-eyed people show more physiological arousal and more sensitive to medications than light-eyed people.
The point here, is that dark-eyed people may shy away from drinking heavily, because they are easily made drunk and this keeps them from developing a physiological dependence. Therefore, blue-eyed people may engage in drinking much more, because they aren’t so physiologically dependent on substances causing them to overdo it and become dependent on alcohol. So, if you’re blue eyed, be careful, because you might become an alcoholic.