Poor kitty, loosing his manhood before ever getting to use it Im just teasing. My new kitty will have to go threw that in about 2 months (I get him tomorrow) and Im sure not going to tell him about it before we go... Best of luck, get it done and over with freeway, fingers crossed here for a smooth and pain-free recovery!
If you can, try to stay with him and get them to let you hold him while he wakes up from the anesthetic. I've done that with Clyde and St. John, and I'm so glad I did! They're so confused and alarmed when they come out of it -- it's got to be scary for them to wake up in a strange place with nobody they know.