Note: Avoid Prussian Doctors!!! At least those of olden days. ;)
At the age of 16, in the decadent court of Augusus the Strong in Prussia, Frederick the Great met two women whose intamacy with him led to his contracting syphillis. His Doctors were able to cure his disease but left him mutilated and impotent. He was never able to consumate his marriage to the pretty Elisabeth Christine.