As an HIV educator and test counselor, I have pretty frank talks with lots of gay men. I would say about 25 percent share info that they are only into oral. The number could be higher since persons who engage in oral sex are on the lower end of the totem pole, I probably have less contact with persons who do not feel that they are at risk.
That said, I still meet guys who are engaging in unprotected anal and who are not on PrEP who also think that there is no risk in their activities for such reasons as “ is HIV still around?” or “ I thought that had been cured because I never hear anything about it anymore”.