My partner and I have been together about 17 years. We've lived together about 12. She knows that I am someone who poops often, I know that she's someone who doesn't poop that often. Normally, I poop once in the morning when we're both around, and beyond that, it's not so consistent when it happens. The knowledge she has of my output is obscured by the various comings and goings we both have.
So for the last month, it's been interesting to see how "ooooooh that's how much you shit" has become clear to her on a digestible level. Living in a one bathroom apartment in particular, it's very obvious to her what the score is. Nice to know that there are parts of ourselves still be revealed.