Turning Brown
A four-year-old boy was eating an apple in the back seat of the car, when he asked, "Daddy, why is my apple turning brown?"
"Because," his dad explained, "after you ate the skin off, the meat of the apple carne into contact with the air, which caused it to oxidize, thus changing the molecular structure and turning it into a different color."
There was a long silence. Then the son asked softly, "Daddy, are you talking to me?"
Disponível em: http://hayspost.com. Acesso em: 10 nov. 2011.
Considerando os participantes da conversa nessa piada, nota-se que o efeito de humor é obtido em função
