I Am Facing A Problem For Last 10 Years. Whenever

I am facing a problem for last 10 years. Whenever I used to see face covered girls with dupatta or something my penis erect and ejaculate semen. Even in my dreams I face the same problem which even happen with me,watching myself as face covered and get erection . I have consulted a psychatrist but they told everything is all rite,there is no problem with u. But even I face normal erections also watching naked girls. But why i am facing this problem.Actually, I am very much depressed I cannot understand what to do.Please help me as soon as possible. Even I do not masturbate because of frequent nightfall.e