Father sent his stupid son to give him a good education. On his return back home after completing his studies the father takes the son to his factory where they make sausages.
He let his son have a good look at the whole factory, the son examined the whole procedure seriously and gave a kinda brainy look.
Dad was so happy and asked his son, so son, do you have any good plans to further develop our business
Son- "Yeah, instead of putting the pigs to the machine and getting sausages, we can put sausages and get the pigs from the other side"
Dad got so annoyed and said, "wow, you are so clever... but only your mom has that type of machine... wen i put my sausage, a pig like u came out"