Recently (last week) my friend had unsafe sex with unknown person (girl).They both don't know each other. They kissed each other with partially open mouth.They used protection while intimacy. But some how by mistake he slightly inserted top part of penis into her vagina and sudden removed it. So my question is how much possibility of having
HIV to him as he don't know is she is infected or not.
Do I suggeste him for a test or consultancy.
Due to open mouth kisses need to afraid him?
PS :- overall she looks fit by health wise.