LOL now THIS is interesting but maybe I can shed light on what I have observed. My last experience with neutering was 20 years ago - the procedure was different back then and the male came home with a bloody backside with the testicles obviously castrated off, testicle, fur, skin and all - and stitched. This new procedure involves a tiny incision (glued closed) and removes the testicles but still leaves the sacs, or scrotum, so it can appear that he still is "intact" so to speak but if you give them a little squeeze, you will find that they are indeed empty sacs
~Nurse Sirrahbed