Syphilis
Syphilis can be spread through vaginal, anal, and oral sex. The mother can also passed down the disease to its infant. Syphilis is a curable, bacterial infection. But after waiting too long for treatment, it can result in damage and cannot be reversed. In its early stage it looks like a painless rash later growing onto a sore. It can affect other organs in the body including your nervous system. It can change your personality, cause blindness, heart problems, dementia, and death. Some people believe that syphilis is what caused Hitler to go mad.