I know exactly what you are going through. My husband nearly didnt go through with it, but as I was there with him and there was no other option open to us contraceptive wise and we had had our family, he did. The worse part was the injection at the start, but after that it was ok. I would not recommend a General for this as it is so quick to do, about 20 minutes, but a sedative would be good and would I am sure make it tolerable. The biggest problem for him was the noise of the equipment. He bought his Ipod along to relax him and every time the machine went it interferred with his Ipod so, embarrassinly for me, he ended up humming very loudly to dull out the sound of the machine!!! The op has made no difference to him sensitivity wise at all.