"A person gets HIV when an infected person's body fluids (blood, semen, fluids from the vagina, or breast milk) enter his or her bloodstream. The virus can enter the blood through linings in the mouth, anus, or sex organs (the penis and vagina), or through broken skin. Both men and women can spread HIV. A person with HIV can feel okay and still transmit the virus to others. Pregnant women with HIV also can pass the virus to their babies. Common ways people get HIV include; sharing a needle to take drugs, having unprotected sex with an infected person You…"
"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…"
"It is very unlikely, but possible. Some people, for example, are born with HIV, which they can pass to other people later in life when they start having sex. People can also pick up herpes through casual kissing — even from friends and family. Their herpes infections can then be passed on sexually. The chances of this happening are rare, so it’s not something to spend time worrying about. On the other hand, it’s another one of the many good reasons to always use condoms when you have sexual intercourse."