Please note: this thread is NOT for fantasy or stories.

In real life, which dominas or pro dommes have damaged men's testicles? It can be either deliberate or accidental. I am limiting it to prodommes because generally, everything else just descends into hearsay and storytelling.

A dominatrix over a 5 year career will see hundreds of men, and in dealing with other ladies in the trade, they do meet sadists and real bitches.

Which dominas do you know of who have caused testicle damage? How did you verify that claim?