Ye gods. Neither Simple George nor his simple caller who was close in age to George have any idea who Joyce Kilmer was, or have ever read or heard Trees. It's doggerel, but every Boomer, as well as their parents, was introduced to it and the "War Poets" by the 10th grade, and Kilmer was the leading American example - it's one of those common cultural touchstones that everyone, at least of those generations, knows.
Except The Black Hole Of Knowledge, George Noory.