Is Dave Barry going mature on us? Well, no. But in Dave Barry Turns 40, he does do some thinking out loud about the aging process, aiming his thoughts at his "career-pursuing, insurance-buying, fitness-observing, Lamaze-class-taking, breast-feeding, data-processing, mortgage-paying, Parents'-Night-attending, business-card-exchanging, compact-disc-owning, tooth-flossing" contemporaries. Funny and true-to-life, especially if you were born before 1957.