Testicles are the oval-shaped sperm-producing organs in males contained within the scrotum. Because testes hang like icicles off a roof, that is how the name testicles came to be. The testicles are meant to be loved and caressed. Any trauma to the testicles will elicit the well-known and much-maligned testiculosoprano reflex, in which a male's normal voice jumps 8 octaves to express the discomfort and pain. For this reason, the United States Preventative Services Task Force (USPSTF) released guidelines recommending against getting kicked in the balls repeatedly. The American Urological Association also recommends to "Check Your Balls" every holiday season.
Did you know an octopus has 8 testicles? Wow! And that it's possible to sweat one's balls off?