PLUMBER
Sewers got clogged. An experienced plumber and his apprentice came to clean it out. Opened the lid. The hole brimmed with shit. The big one takes a tool and dives into the shit. 2 min later he emerges and asks the young one to give him another wrench. Then goes down again.
Another 2 minutes passes, he comes up again and the apprentice gives him one more wrench. It repeats several times.
Finally he creeps out the hole, shit running down all over his body. Job done. And says to his young apprentice: "Watch me and learn or you gonna be a tool-passer whole your life!"
