I seem to have a tolerance to local anesthesia, as I felt the shot, and the first couple incisions. doctor than realized I could feel the cut and gave me more. After that, no problems. Had mine done last year, there is still a slight lump where the cut was made, probably just from pulling the skin together to sew it back shut, but no big deal. Every now and then for the first month or two I got a stabbing pain in the balls, but usually for just a second or two, then it went away and gone completely now. No changes in performance or sensation. still the best 10 seconds of the day.