Little Johnny's Adventure
Little Johnny walks into an ice cream shop, orders six large ice cream cones, then sits down and eats them all, one after another. Another customer sees this, goes over to his table, and says, "Hey, kid! Don't you know that eating ice cream like that is bad for your health?"
"Yeah, well, my grandfather lived to be 100." Little Johnny replies.
"And did he do that by eating six large ice cream cones a day?" the man insists.
"No," Little Johnny replies, "he did it by minding his business."