Last week I had an encounter with a man. I don't know if he was HIV/AIDS positve or not. We both masturbated each other. For sure, I know we used are spit (saliva) and maybe pre-semen (pre-***) for lubrication --not for sure about pre-*** though (lets just say yes though). Also, he touched and rubbed the opening of my penis (urethra) with the same hand. I reached orgasm, he didn't. I read that HIV can be transmitted through urethra. Also, I read it can be transmitted through pre-***, but not saliva. We didn't have oral or anal sex. NO PENETRATION WHAT-SO-EVER. We just masturbated. What are my risks of catching HIV/AIDS or any STD? I am very scarred and nervous. I don't know what to do. Please help me...