Dear service user, Thanks for writing to HCM. I can understand your concern about loss of erection, inability to ejaculate hence unable to have pregnancy. Ability to have sufficient erection and ejaculation during masturbation and not with the partner suggests psychological factors playing role behind this. Occasional failure can occur to almost every man in his life. When this happens, one gets concerned about performance during next sexual encounter. He thinks whether he would be able to satisfy the partner or not. So, his mind thinks mostly about quality of erection and performance. For constant erection continuous exciting/romantic/erotic feelings should be there in mind. If mind is diverted to concern about erection (being scared in your case), you will lose erection. This in turn reduces your confidence and it again affects the erection. Behavior therapy like Sensate focus under guidance of psychiatrist will help you. Wish you good health.