==Famous doctor== 

 I removed this paragraph since I cannot find a single line not only on the study but even on the "famous doctor".  
 In the 1920s, Dr. Howard Flitz, a famous surgeon [citation needed], conducted a series of experiments in which he applied pressure and series of electric shocks to the sigmoid mesocolon nerve of his patients. After a few weeks many of his patients reported back that they were having trouble obtaining an erection. It has been said that damage to this nerve can cause permanent ED. This experiment would not be able to be conducted today as it is ruled unethical.