Three engineers are discussing God's engineering background.
The first one says, "God was clearly an electrical engineer. The human nervous system is a feat of electrical engineering genius!"
The second one says, "Absolutely not! He was a mechanical engineer. The way the muscles and bones interact are mechanically brilliant!"
The third one says, "Nope, you're both idiots. God was a civil engineer. Who else would run a sewage line right through a playground?