system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do dogs whip their tail but cats don't?

ELI5: Why do dogs whip their tail but cats don't?
gpt
Cats do, but it has a completely different background. When you see a cat whipping its tail, it is thinking. And not particularly good thoughts; basically it's pissed at something.

This is why dogs and cats allegedly don't get on, because when a dog sees a cat wagging its tail, he obviously thinks the cat wants to play, which can turn out bad.

Same the other way around; when a cat sees a dog wagging its tail, it thinks he's going to attack, and gets prepared.

If you ever hold a cat in your arms, and it starts wagging its tail, it's usually a good idea to put it down again.