155. Minding your business

A boy is sitting on a bus and eating one piece of chocolate after the other. A man sits down next to him and says: “Eating so much chocolate is not healthy for you boy.” 

The boy replies: “My grandfather died when he was 112 years old.” 

The man asks: “You think he became so old because he was eating lots of chocolate?” 

The boy answers: “He became so old because he minded his own business.”