"No, the amount of virus transmitted through saliva in a kiss, is too little to infect someone else with HIV. BUT; if there are open sores in both mouths and blood is coming out, then there is a chance of HIV transmission."

"Yes. Syphilis is a sexually transmitted disease. A person with syphilis can spread the infection during the first two stages of the disease. If you come in contact with an open sore (first stage) or skin rash (second stage), you can pick up the bacteria that cause the infection. If the bacteria enter your body through an opening such as the penis, anus, vagina, mouth, or broken skin, you can get syphilis. If a person has had syphilis for more than two years, it's unlikely that he or she can spread the disease. Don't take a chance. Use a lubricated…"

"Oral sex may lead to the woman developing throat cancer due to the Human Papilloma virus (HPV), the same virus that causes cervical cancer. If the man is already infected with the virus, there is a high risk of the partner developing throat cancer if they engage in oral sex. The symptoms of cancer may take a short time to show if one is a smoker or takes alcohol because these substances increase the risk of developing the cancer. If the woman has HPV and the man engages in oral sex, he also may develop throat cancer."