Many years ago a chum of mine owned a mynah (sp) bird called Cyril. My friend and her husband used to have some spectacular rows and the language was, to say the least, enough to make a matelot blush.
Unfortunately Cyril was able to mimic them perfectly and used to let rip with some choice language regardless of who was visiting at the time. Most people thought it was hilarious but it was the cause of some embarrassment, too. My chum used to shrug her shoulders and say 'it's Cyril. I don't know where he gets it from'