Heh, heh. That reminds me of an old Far Side cartoon. Two cavemen are looking at a hole in the ground outside a cave. Next to the hole, a forked tree branch is sticking out of the ground with a roll of toilet paper on one of the forks. One of the cavemen is holding what looks like a crescent wrench and is saying, "Ooooh. This not be cheap." The caption under the cartoon reads, "Early plumbers."
Boy, how I miss the Far Side. I'll see if I can find that cartoon.