It is a legitimate point, though.
Toilets too—how does it save water if multiple flushes are needed?
On a related note:
I once saw a video demonstration of toilet manufacturers doing flush tests with ping-pong balls.'
That’s NOT being realistic.
They also need to do toilet flush tests with the equivalent of big cucumbers and so forth.
(Being serious here).
I tried to discuss this with my wife but she found it totally gross. Probably women are less happy discussing poop questions compared to men….