The thing is that he was still able to reach orgasm, but without any semen actually coming out of his penis due to the prostate
surgery he had. However, there were still some precum coming out of his penis.
And when he was giving me oral sex, he was touching his penis and fingering me with the same hand. I worry that his precum might have gotten into my anus, thus making a "unprotected receptive anal sex situation"? Is this a risk for HIV? I am a bit lost in this.