Syphilis is spread through oral, anal, and genital contact. This can be through penetrative sex (bottom or top) and also giving/receiving oral sex.
It is common for syphilis to have no symptoms, so you can have syphilis and not know it. If untreated, syphilis progresses through stages, each of which has different symptoms.
A lot of people do not know that you can get syphilis from oral sex.
This happens when the bacteria responsible for syphilis infection (treponema pallidum) enters a cut or opening in the lining of the lips or mouth. The resulting infection is called oral syphilis.