Masturbation does not cause AIDS. AIDS is a common sexually transmitted disease caused by HIV infection. HIV does not exist in the air, so the only way to get infected with AIDS is to be infected by someone who is infected with HIV. Daily contact with HIV-infected patients will not lead to infection. So if you masturbate at home on your own, it will not lead to HIV infection. And not only this will not lead to HIV infection, but also going out to public restrooms or swimming in public pools will not lead to HIV infection. But in order to avoid AIDS, the most important thing is to strictly eliminate high-risk sexual behavior.