I heard this story from my Western Civilization professor (Who heard this from a tour guide at a castle. I apologize as I do not recall what castle it has been some years since I took that course) that Henry VIII defecated his bed every morning and made his servants clean him and the sheets. While I would like to believe the story for the comedic value, I’ve never seen anything online that confirms or even hints to it
There will be more to say about this particular question, but I have answered before on "tour guide" stories about Henry VIII, in this particular case addressing the claim that the king was so afraid that he had himself bricked into his bedroom every night at bedtime, with a mason kept on hand to demolish the resultant wall each morning when he rose.
You might find it interesting to read my investigation of that story here while you wait for fresh responses to your query: