Why did the chicken cross the road?

Does it really matter? Why do we have to know why the chicken crossed the road? Can't he just cross the road in peace? Like really, does it matter where he is going? And what's with the obsession with the chicken? I mean why not make it more realistic and make it a deer? Or make it more creative - such as a walking fish? So many questions I have but yet everyone keeps asking the same question - why did the chicken cross the road?