I am an india, from kerala my problem is since 3 years now,,I am engaged and,,but since 3 years now,, i cannot have intercours with my wife. while we are near and start to have sex, my penis will get erect, and when i trying to insert my penis in her vagina suddenly my penis is becoming down and not erecting at all. iam really shame with my wife, what to do I dont know, please you people can help me,,please show me the good suggetion. if any good doctors near by Mangalore Karnataka, please advise me thanks and regards jai