Not exactly. It’s usually done by female cats. It’s normal for them to do this when they have kittens. What happens when they are sterile? Well, the behaviour continues without any kittens to bring it to. Bringing it home is just what happens.

Sounds like a religion and a god of the gaps concept.

Anxiety, not introversion.

Still though. People ought to stop equating the two.

Divinity original sin 1 and 2.

The first one is harder. 2nd one if better to start with. Good fun if you like strategy and storytelling.