A couple of years ago my wife took Ziggy for a check up at the vet. Ziggy is my dog, a cocker spaniel, and when the vet felt his testicles he said to my wife, "You should keep an eye on this. It's a bit odd." At which point my wife said "Christ, my husband's testicle feels a bit strange. One's feeling a lot harder." The vet told Ollie I should get tested immediately.