Why did the chicken cross the road? To get to "the other side."
Now you can take this one of two ways. Either the chicken simply wants to arrive on the other side of the road, or he is suicidal and wants to reach the afterlife.
This is where my confusion sets in. According to a Wikipedia article, "The first known printing of this riddle was in 1847."
I'd like to know the origin of the phrase "the other side" being used to mean the afterlife.