<s>[INST] hi , I have problem in erection , I could have a hard penis during , but by stopping physical stimulation the penis shrinks quickly specialy if I stands up , I haven t morning ercection for a very long time , is it venous leakage , and if it is , is the over masterbuation is the reason [/INST] Degree understand your concerns went through your details. I suggest you not to worry much. Most of the erectile dysfunction and lack of interest in sexual matters come out of anxiety and lack of knowledge. You are anxious or rather apprehensive about what might happen sexually after marriage. You are worried about your sexual performance. Such worries, rather apprehension Chat Doctor.  Nothing wrong shall happen. Have faith and confidence. Stop worrying about future. Masturbation cannot have any adverse effect on your erection, but anxiety regarding health due to masturbation can affect. Psychotherapy techniques should suit your requirement. If you require more of my help in this aspect, Please post a direct question to me in this URL. http://goo.gl/aYW2pR. Make sure that you include every minute details possible. I shall prescribe the needed psychotherapy techniques. Hope this answers your query. Available for further clarifications. Good luck. </s>