Alright so I?m 22 years old and I have trouble maintaining an erection. I have watched porn since I was maybe like 14. You know nothing too hardcore but like anything that was HD was what I normally went for. When I found out I had a problem was back when I was 19 and tried having sex with my gf. The first time it didn?t work out cause I couldn?t get hard. Then we tried a second time and I had the same trouble but we managed to have pretty good sex because once I was hard I was able stay hard for like 10/15 seconds and if I inserted within that time and started having sex then I would stay hard no problem. The problem I have is keeping an erection without any stimulation. So during oral sex I have no problem maintaining an erection because it is a consistent stimulation. My problem is basically keep an erection without having any sort of stimulus. I get hard but then I can?t maintain it long enough unless I?m getting head or I insert right away. I?m a healthy guy, I work out, I?m in good shape. I believe my problem might be porn. I am not sure if anyone else has experienced this and if yes then what should I be doing? Currently I have a gf that I get intimate with and I want to be able to have sex but I?m a scared that I won?t be able to hold an erection long enough to penetrate.