Hey, do you wanna hear a joke about potassium?
What did the lion say to the Octopus?
Nothing, lion's can't speak. And even if they did, the chances of one ever encountering an octopus are very slim.
What happens when you breed a Siberian Tiger with a California Condor?
Nothing. The tiger does eat the condor though and you are found out by a neighbor and charged with animal neglect, animal cruelty, and possession of two endangered species. You are fined $100,000 and go to jail for 5 years during which you are sodomized.
What do you get when you cross a duck with a cat?
You can't. The current state of genetic engineering will not allow avian DNA and mammalian DNA to be combined.