My question is I lost sexual desire with my girl friend. When we date and being sex I have no interest to do anything and also facing erectile dysfunction (can't erectile or penis totally weak). Since before i'm more addicted in porn watching and masturbation, also alcohol and cannabis addiction, also I have took psychiatric treatment around 1 year continue due to over abuse of marijuana (medicine include for treatment for mania and depression _3 months for mania 4 months for depression) stil I stopped that addiction but whenever I saw porn I got full sex desire or interest also my penis become quick stand and very strong. Let me know what's the core reason of my problem of erectile dysfunction and lack of sexual interest towards my life partner. This.