Hi, I'm a 19 year old male, I workout 4 times a week, and I eat a fairly healthy diet. I dont eat greesy foods and no pop and I am in really good shape. I take no medications, but i do take protein powder before and after I workout, a muti vitamin and 900 mg of omega-3 in the morning, creatine after I workout, and ZMA supplement before bed. The creatine and ZMA I cycle one month on and two months off, just to be safe. I also talked with my doctor and he said these were all fine products to take.Even though I am very healthy, for about the last year and a half I have been experiencing a problem with my erections. I have no problem getting an erection and I can maintain it as long as I am recieving stimulation, but as soon as I stop recieving stimulation I lose my erection. It doesnt matter what kind of stimulation either, if im masterbating and stop the stimulation the erection goes away and if I am with my girlfriend and stop recieving stimulation the erection goes away. I have been with my girlfriend for two years now, and we just bacame sexully active about a month ago, when she turned 18. During intercourse I maintain an erection the whole time. Even before we had sex and she would do things like give me blow jobs and hand jobs I would still have an erection unless she stoped and it would go away as soon as my dick didnt recieve stimulation. I know this isn't a relationship problem because I am very attracted to her and love her very much. I also know it isnt performance anxiety because I have the same problem when I masterbate, and it happens everytime, with my girlfriend and when I'm alone, and I don't feel nervous either, I am just frustrated with this problem. I never have a problem reaching orgasm, or staying hard while recieving stimulation, so I'm not sure I have erectile dysfunction or something else. I used to masterbate about once everyday, until about 4 months ago when I decided that masterbation could be apart of the problem. I also used to watch porn when I would masterbate but i stoped watching porn when I decided to masterbate less. I orginally thought porn could be apart of the problem, because up until about 4 months ago I would watch it everyday. Up until about four months ago I watched porn everyday and that had gone on for about a year, previous to that, I would only watch porn about 2-3 times a week, and would only masterbate when I watched porn. The problem did occur after I started watching porn and that is what made me think porn was the problem, but now I havent watched porn for 4 months and I still have this problem. Currently I watch no porn, have a very heathy diet/ lifestyle, I have sex about twice a week and masterbate 0-1 times a week. I also have a wonderful girlfriend and a wonderful relationship except for this problem. We talked about the problem and she doesnt seem to mind giving me constant stimulation, but I just want to be better for her, and I hate that I have this problem. I also never smoke or drink and have done everything I can, short of herbs or sex pills and other devices, to figure out and fix my problem but nothing has worked. Can you please help me fix this permanantly, I just want to be like my old self