Serious Poem

Only one of the haiku poems below is serious. The others are frivolous. Can you spot the serious poem? zero, one, two, three, four, five, six, seven, eight, nine, ten, eleven, twelve Do four out of five dentists really prefer sugarless Trident? twelve, eleven, ten, nine, eight, seven, six, five, four, three, two, one, zero Is a poem any more than a validation of our perceptions? I gave the Peace sign at a football game and was handed two hot dogs! The six questions that reporters ask are "What?," "Why?," "Where?," "How?," "When?," and "Who?"