Urologist Flat World Logic

According to our urologist the world is flat The bladder is full, roundish and soft Peas are green. Pee is yellow He is a happy fellow small and plump Hails from a land more advanced than us Where things fall off all of a sudden Before the pub but after the postal stop Gone too soon for their own good Oblivion, urology is all the same stuff One man's nothing is another man's logic There are no countries called Urine-Nation No planets called Urine-Trouble But there could be an infection down under What is that thing floating around the sun? Doctors say it is a figment of your imagination Our Urologist will say anything for a dollar He will swear the Earth is a pancake or Truffle Or a cosmic muffin if paid enough