IMO The LLM you're using has failed to mimic the tone of OP's bathroom joke.
These alternatives are uncomfortably crude. They largely make gross reference to excretory acts or human waste. The original comment was off color, but it didn't go beyond a vague discussion of a shared human experience.
One shouldn’t expect the ‘joke’ to have identical tone. (As if that’s even measurable.)
The point was simply that these examples are not trending towards the average or ‘ablating’ things as the article puts it. They seem fairly creative, some are funny, all are gross… and they are the result of very brief prompt… you can ‘sculpt’ the output in ways that go way beyond the boring crap you typically find in AI-generated slop.