This lady holds the world record for strongest vagina. She is holding a plug in with a kegal action. Weights are added to prove strength. I wanted to do a system wide challenge - same "equipment" used to do the measuring so it could be asynchronous and girls from all over the state could compete. I couldn't get one taker, though.
As for the testicles rupturing - I had a couple of clients who were in to testicle torture. One of them can really take a beating and cum from that. I'm talking punches so hard it hurt my hand. Not kicking, though. Lucky for me because I don't think I'm coordinated enough to do those fancy kicks. LOL This was over a period of years and was his lifelong fetish and no damage - not even sore the next day.
