Chad Wegkamp, a schizophrenic 18 year-old boy in Virginia USA, became so obsessed with the idea that his testicles were too big he robbed a bank to pay for plastic surgery.
Even though doctors told him everything was normal, Chad had started cutting holes in his underwear so he could tape up his scrotum. One day it got so bad that he tried to operate on himself with scissors. He only stopped because there was so much pain and blood.
Finally he decided he needed to have a proper operation. First, he tried to make his own banknotes. Then he robbed a local bank. It went successfully, and he got away with $6,000. Unfortunately the police soon caught up with him.
When his father confronted him about the police's suspicions, Chad could only say: "Dad, I needed the money for my scrotum".
Full rather sad story
here