Dr. John Brinkley
Doctor Brinkley made his money by convincing men to undergo surgery to restore their virility — he implanted goat testicles into their bodies. As ridiculous as that sounds, quite a few believed him. Brinkley was performing up to 50 surgeries a week at a price of $750 per, and that’s in 1920’s dollars. Because impotency has a psychological component, some patients experienced a placebo effect and so thought they were cured, giving the doctor some credibility. Brinkley was eventually exposed as a quack and died penniless.