Had mine done a few weeks ago. I had a wank the next day. My balls went all the shades of bruising you could imagine along withthe first couple of inches of my c**k. I was about a week before I felt up to running, but that was becuase I didn't want to upset the stiches in my sack rather than any inherent pain in my 'nads.
Managed to get my resting heart-rate down to 38bpm during the op!
I'm due to go for the first sample test this week.