As long as each individual is aware, and able to judge, that is to say not "vulnerable" whatever that means, I don't agree with your lecture.
Where do you put the "red line"? Is BBBJ a risk that you think is acceptable while FS is not? And Pussy licking? Well, any of those activity can lead to STDs and therefore transmission of the same. I repeat, the only safe sex, is no sex. Beyond that, it is everyone's assessment of the risks which directs behavior. And this assessment is different with every one. You may "judge" that BBFS is highly crticizble, and that BBBJ is not. Other may judge that even BBBJ is highly criticzable. And others will say that any sex with somebody else than your presumed "faithful partner" is unacceptable. And I say that I don't judge anyne withut knowledge of their particluar circumstances. For your info, there are hundreds of clubs in Germany which are officially "no condoms". Thousand of men and women engage in vast AO (Alles ohne) gangbangs every day in Germany. Should they all be put in jail? The point is that there is no more STds within this population than the "ordinary" mongering/prostitutes ones. I have never gone BBFS in ny mongering life, but have occasionnally picked up some infection, most probably from BBBJ, and even once in Japan.
Anyway, let this debate rest for a while. I respect your views,of course, but I don't necessarily shat=re them..
Cheers