Me too. I think some things should remain private.
We need to announce it in order to have a peaceful experience. Otherwise, if we leave the door unlocked, ds1 will barge in and leave the door open when he leaves, and goodbye privacy. If we lock the door, he stands outside and screams. So the non-pooping parent needs to know they have to occupy the toddler elsewhere for awhile.
For all of our fart jokes, in 7 years of togetherness I have convinced my DH that I simply do not poop. It's where I draw the line on the 'veil of mystery'
I use the main floor bathroom, so with DS demanding to know what's going on behind closed doors, my days of leisurely pooping are behind me. (see what I did there?)
DH uses the basement bathroom - so it's pretty clear when he grabs the iPad and heads downstairs. Those stairs are blocked and locked, so DS doesn't follow him and I just make the assumption around what's going on.