Dutch researchers from the University of Twente have recently concluded people make better decisions when their bladders are full. That particular finding was a side-effect of how they conducted their study on personal self-control. They created situations where people had to exert self-control in other areas in order to determine if there was a correlation in exhibiting increased self-control elsewhere as a result. Filling up the subject's bladders with water and making them have to "hold it in" forced the self-control matter whereupon observations confirmed the subjects made more logical choices under self-control duress.