I never had to do that, I don’t know why I would have to.
We do have some old toilets that would make that possible and the one in my house sadly is one of them.
The new toilets also let the poop fall into the water directly, they just aren’t filled with water to the top, it is enough to have a small pool of water at the bottom.
Correct, if we go to a red dwarf star after a few minutes we would also percieve the light as white if it isn’t extremely red.