Also I wanted to say please, just be honest with your wife. I say this AS a wife, I'd want my husband to tell me. There's so much love, understanding and trust between a married couple and I'm SURE she'll be understanding. It's something you both could work at together. I'd want to know if it were my husband. I wouldn't want him dealing with it alone..we're married and we do things together. :) NO matter what they are. Best of luck!! :)
I'm sorry to hear about your problems as I'm sure not being able to do this is also stressful. I was looking things up when I came across this web page. I hope it helps. I found the "postage stamp test" pretty interesting.
http ://www.medicinenet. com/script/main/art. asp?articlekey= 51148
Just copy and paste that, minus the spaces lol. I hope you're able to figure out what's going on and get back to a normal and healthy sex life.