A grade school teacher was asking students what their parents did for a living. "Tim, you be first," he said. "What does your mother do all day?"
Tim stood up and proudly said, "She's a doctor."
"That's wonderful. How about you, Anne?"
Anne stood up, looked briefly at her feet, and said, "My father delivers pizza."
"Thank you, Anne," said the teacher. "What about your father, Billy?"
Billy bolted upright and announced, "My daddy cons people out of their money, destroys crops and breaks into laboratories."
The teacher was aghast and promptly changed the subject to geography. Later that day he called Billy's father on the phone, asking for a logical explanation of Billy's statement in class.
Billy's father said, "I'm an environmental activist. But how can I explain a thing like that to a seven-year-old?"