Wow, that beaver thing is true. WTF?
"Aelian fays that this Animal knowing that Men do hunt it only to get this Liquor of so great use in Physic, tears off its Testicles when it sees it self closely pursued by the Hunters, and leaves them to them as for its ransom." From "The natural history of animals: Containing the anatomical description of several creatures dissected, by the Royal academy of sciences at Paris." 1702.