Many genital viruses have nothing to do with their oral counterparts. You can't give genital herpes to someone's mouth.
Otherwise, you can get STDs if you have cuts, which is extremly rare. It's even safer to give head with cuts in your mouth than unprotected sex. If you get blood into your system (besides down to your stomach where it gets destroyed) then you may be at risk. But this is a risk so small it is unimaginable. Should this happen, God hates you and you should end yourself.
I therefore deem oral sex safe. Gg.
Otherwise, you can get STDs if you have cuts, which is extremly rare. It's even safer to give head with cuts in your mouth than unprotected sex. If you get blood into your system (besides down to your stomach where it gets destroyed) then you may be at risk. But this is a risk so small it is unimaginable. Should this happen, God hates you and you should end yourself.
I therefore deem oral sex safe. Gg.