hi... Pankaj... thanks for writing.. I have understood your concerns.. u have been practicing masturbation for last 7 to 8 years...masturbation is not a bad habit..it does not cause any physical and sexual weakness..it is a way of satisfying your sexual needs in the absence of female partner...dont believe in the myths prevailing in the community... your erectile problem is not because of masturbation..the size of penis in normal state is not important...the size matters only in erectile state.. if the size of penis in erectile state is 2 or more than 2 inches then u need not worry..the sensitive part of female vagina is only outer one third and that is less than 2 inches.. the erectile problem can also occur because of the worry and anxiety regarding sexual performance and partner s satisfaction...if u have any stress in your life, it may be the cause.. keep your mind calm and cool by exercise, yoga, meditation, relaxation therapy.. the problem is not serious but your anxiety can worsen it..so in my opinion u shud consult a psychiatrist and tell about your problems...he will guide u and advise about further treatment ...it can be treated by drugs and psychotherapy.. i hope u will find this advice hopeful..best luck...