You first?

Also, what is that babble about "the planet's ecosystem" being better off by eliminating humans? If you really want to see it as a whole - the Gaia hypothesis - then humans are part of it just like flies and ticks and mosquitos and birds and whales. All play a role, some spread diseases to others while they feed yet again others. Removing humans from the equation is just like Mao's decision to get rid of the sparrows which ate some of the harvest in that the balance will shift until a new equilibrium has been reached. In Mao's case it killed tens of millions of humans, removing humans will result in the death of hundreds of millions of other species.

There's no such thing as introducing species where they don't belong. Ecosystem are dynamic, several other animals serve as vectors for transporting species from a place to another. There's no such thing as a long term static equilibria where godess gaia looks like a Jehova's witnesses book illustration. This is an incredibly cultish and misanthropic position.

In dwarf fortress you can have dragons as pets. Never got there, tho I think I will train dogs in my current fortress.

Beyond that, longer than we've had the written word.

Domestication of animals might be the single greatest achievement of humans.

I defecate indoors. Should I not be allowed bear food prep areas?

Obscene is the right word because it's quite manageable in health terms, it just feels bad to you.

Cats have standards that prevent that person from getting hired as a servant.