Rhubarb Tart

I want another slice of rhubarb tart
I want another lovely slice
I'm not disparaging the blueberry pie
But rhubarb tart is oh-so-very nice
A rhubarb what? A rhubarb tart
A what-barb tart? A rhu-barb tart
I want another slice of rhubarb tart
The principles of modern philosophy
Were postulated by Descartes
Discarding everything he wasn't certain of
He said, "I think therefore I am rhubarb tart"
A rhubarb what? A rhubarb tart
Rene who? Rene Descartes
Poor mutt, he thought he was a rhubarb tart
Rhubarb tart has fascinated all the poets
Especially the Immortal Bard
He made Richard the Third call out at Bosworth Field
"My kingdom for a slice of rhubarb tart"
Immortal what? Immortal tart
Rhubarb what? A rhubarb Bard
As rhymes go that is really pretty bad
Since Wassily Kandinsky and Paul Klee
Laid down the axioms of abstract art
Even Jackson Pollock and Piet Mondrian
Prefer to paint a slice of rhubarb tart
Wassi who? A Wassi-ly
Kandin who? A Kandin-sky
And how he get in there for a start?
Read all the existentialist philosophers
Like Schopenhauer and Jean-Paul Sarte
Even Martin Heidegger agreed on one thing
Eternal happiness is rhubarb tart
A rhubarb what? A rhubarb tart
Jean-Paul who? Jean Paul Sarte
That sounds just like a rhyme from Lionel Barte
I want another slice of rhubarb tart
I want another lovely slice
I'm not disparaging the blueberry pie
But rhubarb tart is oh-so-very nice