Hello Thanks for your query,based on the facts that you have posted it appears that you are facing problem of secondary ejaculation .In absence of any major health issue cause of ED is mind related and due to what is called as performance anxiety. Following measure will help you to boost up your confidence and getting good erection.and delay ejaculation. 1) Practice regular exercise for 45 minutes followed by meditation for 1/2 an hour in the morning. 2) Take high protein diet rich in vegetables and fruits and Vitamin A,C,D,E.and Zinc 3)Take anti oxidants like Almonds 5-6 everyday.. 4) Avoid alcohol and smoking.. You may take Sidenafil (Viagra)as on demand to get hard sustainable erection and to delay ejaculation.. Dr.Patil.