It is fairly normal. After being sober 8 months it is starting to come back. You have to remember that alcohol (and drugs) were your best friend, mistress, counselor, everything for so long. I talk with my wife about it and I don't stress about sex. It is a popular topic and there in a mens forum here where you may get more specific and personal opinions. I think you are doing great with 8 months of being clean and sober. You will be "back in the saddle" again and the good news is that you will remember everything and most likely be a proud of your actions.