Is it safe to give oral sex and swallow semen to someone that is a Virgin? ( he's never done any sexual activity) I have a really weak immune system. Also, is it safe to touch surfaces where lots of people are around (adults, teens, little children, babies) after touching a penis/semen. My hands were dry. But I just don't want anyone picking up germs if you know what I mean. Overall question: does semen/precm/penis have germs or bacteria etc that can cause serious disease/illnes/infection for anyone? (Adults, teens, children, pensioners) thank you. I just want to keep myself safe and the people around me as I made the mistake of not washing my hands after touching pre cm and semen and a penis and went to a public place.