I love dark humor and I have to - regretfully!! - confess that I do not get it. What?? How is someone wanting to not poop for days related to the submarine? Is it just that they didn’t have a bathroom on board because they didn’t anticipate being gone that long?

I am genuinely so sorry to ask! I know explaining kills the joke, and I don’t mind if you don’t answer because you don’t want to kill it, I’m okay with not getting it.