[Bitter Buffalo]

And what's more, Bitter Buffalo, there would never be half-man, half-tigers. As I've said before, you can't interbreed with another phyla of the animal kingdom. Humans can only mate with humans to create offspring. If a human were to amte with, let's say, a tiger, then nothing would happen as a result, as the DNA of a human and tiger are not similar enough to create an offspring. However, if you were to take a horse and a donkey, a mule would be their offspring, since their DNA is indeed similar enough to create an offspring. However, the consequences of the two animals mating is that the mule is rendered infertile, and cannot produce any offspring as a result.

That's why it was a joke.