A man walks into a store that sells bees and the honey they make. "The Bee Store," it is called. He approaches the clerk behind the counter. "I'd like ten bees, please," he says. "The standard honey bees?" the clerk asks. "Yes, please," the man replies. The clerk retrieves a large jar, puts the bees inside and brings it to the man.
He looks at the bees in the jar. "You made a mistake," he says. "There are 11 bees in here." "I know," the clerk replies. "The extra one is a free bee."