It's funny... out of all the variety of Far Side gags, somehow cow tools became an underground classic of sorts. To me, it's a medium-funny gag, but there are much funnier ones.
So what is it, then? Did it capture some key, psychological insight in to animal intelligence vs. naked ape intelligence? Is cow tools a versatile trope in a way that most of the others couldn't be?
Am I even in the ballpark, or like Lewis Black, should I simply jam a sharpened pencil in my eye? lol