To be diagnozed with a sexually transmitted illness should, principally, not be different from having a diagnosis like e.g. "the flu". You don't have to be promiscuous to get e.g. a gonorrhea, only being in bad luck. I knew a very young man who was contaminated with AIDS by his very first partner.
I fear that some people keep their symptoms secret because they fear that they are ill from sexually transmitted illnesses and see this as an endurable shame.
just on stats alone, an intelligent person can see some ladies aren't being truthful