So I was fooling around with this guy I do not know and unknown HIV status, and he sucked and I want to say nibbled on my breasts/nipples aggressively. I could feel his teeth, but it did not hurt like he bit me or anything and I did not see any blood on my nipples or teeth marks at all either. Now we did not have any sex at all, but he did ejaculate on my breasts. My question is if there were possible micro cuts on my breasts, would this count as an open wound and would it be possible for the semen to enter my blood stream through here, assuming he has HIV? I did not see any definition of what actually constitutes an open wound, so this is why I am asking. I know its an odd question, but I do appreciate your help. Thank you so much.