So what am I going to write about? How about the common and the vulgar, and did I mention common?
As pilots we never talk about pooping, but it still actually happens, so let's open a dialogue:
It is acceptable to be late for a flight due to intestinal concerns.
If you are about to board an aircraft and your bowels clench, then you are supposed to disembark and deal with the problem before starting a flight.
It is perfectly acceptable to divert a flight for a bathroom break. It's better than exploding, then crashing at your destination.
That is all.