Hi Sir, Welcome to Health Care Magic I can certainly understand your concern and worry about your sexual problem I can advise you that because of your overmasturbation, skin over penis gets over keratinized and sensitivity will be decreased, so try to avoid over masturbating by engaging yourself in some activity or the other... You have mentioned that you have small male organ or penis, but there is a possibility that because of overweight , fat can be deposited in the lower abdomen and around the pubis, which may result in smaller penis...So I would like to know your exact weight, if you are overweight , try to reduce your weight by exercise and proper diet. I would advise you to make sure about your erectile dysfunction by NPT test, that which normal erection in early morning in sleep. If you are really having problem, I can advise you to avoid alcohol and smoking if any, maintain adequate weight, be relaxed and stress free, perform some pelvic exercises, at last you can start sildenafil , which helps in the production of nitric oxide NO , for sustaining your erection for long time and also premature ejaculation.please specify what kind of nervous problem you are facing? If you are doubtful about your semen quality, you can. Undergo semen analysis. Please consult your psychiatrist about your memory problem, as this is not the common age to suffer with, it seems that because of stress you are experiencing that memory disturbances, you can. Start SSRIs like escitalopram to get rid of your anxiety and stress Post your further questions if any, I will available to take up your follow up questions Thank you