Don't some of us parents & teachers have a tendency to go on and on?
“We recommend above all not to give too many explanations... Here is an anecdote to illustrate this advice: A child asks his father why the leaves are green. Happy to seize the opportunity, the father launches into explanations of chlorophyll, the air, light, seeming never to finish. The child listens politely but thinks: “What a shame to have provoked all that!””