We all know cigarettes and radioactivity will give us cancer, but what about being frequent flyer or your finger length. Your lifestyle may be the indication for it. #1. Because You’re Fingers Are Too Long Well, actually, just your ring finger, and only if you are a man. A 15-year study of 4,500 men showed that those with ring fingers longer than their index finger were three times more likely to develop prostate cancer. Embryos with higher levels of testosterone were more likely to have longer ring fingers, and this is thought to be related to the increased prostate risk as an adult.