The sense of oddity in that taunt is that Trump wouldn’t want to clean those toilets or any toilets at all. Fitness has nothing to do with it. The supposed “wit” is sophomoric and devoid of humor.
Here’s Trump doing blue collar jobs, including housekeeping, at one of his properties:
https://www.youtube.com/watch?v=88cwgAL4o18
Ever notice how no one would DARE say such things about the Usurper, but feel they can trash the President of the United States in the most basest of terms in print?
A pox on all their houses.