Actually First they showed the vasectomy which was not bad at all a couple of stitches and sit with ice on your lap for a few days.

Then they showed the reversal which involved removing the testicles from the scrotum to get far enough in to connect to an unfused part of whatever the tube that the sperm comes out of is called. It looked far too bloody and way too complicated for according to the show a small chance of being able to conceive anyway.