It'd more to prevent the cats and dragons from seeing someone do that. If they do they'll attempt to emulate the behavior and then it's cat hair and dragon fur in the meals at all hours. A terrible thing.

[The most pragmatic and domestic answer is also the most true.]

I've enough to mind without wondering about something extra, and you've enough to mind without having to explain it. This way neither of us is unduly burdened, mm?