As for how Sheen contracted HIV, he says he is not sure how it happened. He also said that since being diagnosed, he has informed every sexual partner he’s had and that he was sure, in fact that it was “impossible” that he had not given it to them. There are two ways HIV is spread in the United States: sexual intercourse, and sharing needles. Although Sheen has a history of drug use, he denied any possibility of contracting the virus through sharing needles. He did admit to having frequent visits with prostitutes in his life.