I put two fingers in the anus of one of them (who, I am almost sure, is HIV+), practiced rimming and kissed his balls and his underwear (both were wet, not sure it it was because
of water, gel or
of pre-cum though the two first ones seem more evident). This guy cleaned his anus and his genitals before we had sex, so I thought it was not too risky. However, the second guy penetrated him later and saw blood on this penis. I don't think that I saw blood when I penetrated him with my fingers.