Being licked on the nipple does not usually lead to HIV infection, but it is possible for both partners to be infected if they have broken skin and mucous membranes. HIV is found in body fluids such as blood, semen, vaginal secretions, cerebrospinal fluid, pleural and abdominal fluid, amniotic fluid and breast milk, and is transmitted through sexual contact, blood and blood products, and mother-to-child transmission. The chance of infection is only possible after coming into contact with the blood and body fluids of an infected person through broken skin or mucous membranes. Being licked on the nipple does not usually lead to HIV infection, but it is possible to get infected if the other person has a broken and bleeding mouth and if the person being licked has a cut on his or her skin. It has not been found that AIDS can be transmitted through daily contact such as the respiratory tract, food, sweat, tears, mosquitoes, shaking hands and hugging. If you are worried about HIV infection, it is recommended that you seek medical attention in time to improve the relevant examinations and make a clear diagnosis, so as not to delay the condition.