"Pulling out before the man ejaculates, known as the withdrawal method, is not a foolproof method for birth control. Some ejaculate (fluid that contains sperm) may be released before the man actually climaxes. In addition, some men may not have the willpower or be able to withdraw in time."
"A woman normally produces a vaginal discharge that usually is described as clear or slightly cloudy, non-irritating, and odor-free. During the normal menstrual cycle, the amount and consistency of discharge can vary. At one time of the month, there may be a small amount of a very thin or watery discharge; and at another time, a more extensive thicker discharge may appear. All of these excretions could be considered normal. A vaginal discharge that has an odor or that is irritating usually is considered an abnormal discharge. The irritation might be itching or burning, or both. The itching may be…"
"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…"