A tantalizing trifle

A tantalizing trifle for retired folk like me/is often of more value than a colonoscopy/for as the years pile on my head and squeeze my tired brain/a bit of fluff and fancy helps me sanity maintain/A chuckle and a grin are all I ask of my existence/they help this poor old bookworm to keep going all the distance/Heavy tomes are not for me; I'm done with old Tolstoy/I'd rather read a taradiddle meant for hoi polloi/Trifles from a kindly clown who writes with airy pen/are better for my health than anything from stern Wise Men.