Do I Make Myself Clear?

There comes a time to coax a deuce
Or still another after tea
Before digestion calls a truce
For gastroenterology,
Which needs a little inner space
Where fiber optics may explore
(as you are out cold on your face)
The guts above your pelvic floor:
Specifically...the colon,
Where bacteria breaks things down
And the liquid soon gets stolen
From a matter that's extra brown,
But that's not the hue they wish to see
When conducting colonoscopy.