As I continue to read more about the risks associated with sex, I am asking myself what could be the most safest form of sex that exists. I understand that condoms do prevent major risks like HIV. I don't know the effectiveness of condoms in minimizing herpes infection, which is still a major STI. From the list of various options like - intercourse, oral sex, anal sex, dry humping, handjob, masturbation - what is order of sex options available in decreasing order of safety? I assume masturbation is the safest. How safe is a handjob? How safe are other options? Can someone detail?