Another two cents
In my active hobbying days, now over, I once carelessly had BBFS with an SP. I hadn`t asked for it, we just stupidly got carried away in the heat of the moment. I didn`t catch any STD, but just the fear of possibliy infecting my wife made me suspend our regular sex life. That was enough to precipitate the end of our relationship. She never found out, but the marriage ended nonetheless.
To your original question, ETS, you might think of being careful to avoid catching an STD, which in practice means renouncing .