Summarizing the history of people anthropomorphising animals...

Because there is no better way to destroy comedy than over analyzing it.  While it may have deeper implications today than it did decades ago, people parodying things by acting like animals is one of the oldest forms of comedy. Here's a great clip of someone pretending to be a UW mascot — in a guest spot on YouTube.  (If you've only got 2 seconds to spare, click this ).

And here is an example from the British school.

And let's not forget this absolutely classic bit!  Ouch!